diff --git a/CHANGELOG.md b/CHANGELOG.md
index 391e62823..e6d58d336 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - Support for the DeliverMax field in Payment transactions
 - Support for the `feature` RPC
+- Improved validation for models to also check param types
 
 ### Fixed
 - Allow empty strings for the purpose of removing fields in DIDSet transaction
diff --git a/tests/unit/models/test_base_model.py b/tests/unit/models/test_base_model.py
index 03c628c97..b22695207 100644
--- a/tests/unit/models/test_base_model.py
+++ b/tests/unit/models/test_base_model.py
@@ -28,6 +28,7 @@
     SignerListSet,
     TrustSet,
     TrustSetFlag,
+    XChainAddAccountCreateAttestation,
     XChainClaim,
 )
 from xrpl.models.transactions.transaction import Transaction
@@ -83,15 +84,44 @@ def test_is_dict_of_model_when_not_true(self):
             ),
         )
 
+    def test_bad_type(self):
+        transaction_dict = {
+            "account": 1,
+            "amount": 10,
+            "destination": 1,
+        }
+        with self.assertRaises(XRPLModelException):
+            Payment(**transaction_dict)
+
+    def test_bad_type_flags(self):
+        transaction_dict = {
+            "account": account,
+            "amount": value,
+            "destination": destination,
+            "flags": "1234",  # should be an int
+        }
+        with self.assertRaises(XRPLModelException):
+            Payment(**transaction_dict)
+
+    def test_bad_type_enum(self):
+        path_find_dict = {
+            "subcommand": "blah",  # this is invalid
+            "source_account": "raoV5dkC66XvGWjSzUhCUuuGM3YFTitMxT",
+            "destination_account": "rJjusz1VauNA9XaHxJoiwHe38bmQFz1sUV",
+            "destination_amount": "100",
+        }
+        with self.assertRaises(XRPLModelException):
+            PathFind(**path_find_dict)
+
 
 class TestFromDict(TestCase):
     maxDiff = 2000
 
-    def test_from_dict_basic(self):
+    def test_basic(self):
         amount = IssuedCurrencyAmount.from_dict(amount_dict)
         self.assertEqual(amount, IssuedCurrencyAmount(**amount_dict))
 
-    def test_from_dict_recursive_amount(self):
+    def test_recursive_amount(self):
         check_create = CheckCreate.from_dict(check_create_dict)
 
         expected_dict = {
@@ -102,7 +132,7 @@ def test_from_dict_recursive_amount(self):
         }
         self.assertEqual(expected_dict, check_create.to_dict())
 
-    def test_from_dict_recursive_currency(self):
+    def test_recursive_currency(self):
         xrp = {"currency": "XRP"}
         issued_currency = {
             "currency": currency,
@@ -122,7 +152,7 @@ def test_from_dict_recursive_currency(self):
         }
         self.assertEqual(expected_dict, book_offers.to_dict())
 
-    def test_from_dict_recursive_transaction(self):
+    def test_recursive_transaction(self):
         transaction = CheckCreate.from_dict(check_create_dict)
         sign_dict = {"secret": secret, "transaction": transaction.to_dict()}
         sign = Sign.from_dict(sign_dict)
@@ -139,7 +169,7 @@ def test_from_dict_recursive_transaction(self):
         del expected_dict["transaction"]
         self.assertEqual(expected_dict, sign.to_dict())
 
-    def test_from_dict_recursive_transaction_tx_json(self):
+    def test_recursive_transaction_tx_json(self):
         transaction = CheckCreate.from_dict(check_create_dict)
         sign_dict = {"secret": secret, "tx_json": transaction.to_dict()}
         sign = Sign.from_dict(sign_dict)
@@ -155,7 +185,7 @@ def test_from_dict_recursive_transaction_tx_json(self):
         }
         self.assertEqual(expected_dict, sign.to_dict())
 
-    def test_from_dict_signer(self):
+    def test_signer(self):
         dictionary = {
             "account": "rpqBNcDpWaqZC2Rksayf8UyG66Fyv2JTQy",
             "fee": "10",
@@ -186,7 +216,7 @@ def test_from_dict_signer(self):
         actual = SignerListSet.from_dict(dictionary)
         self.assertEqual(actual, expected)
 
-    def test_from_dict_trust_set(self):
+    def test_trust_set(self):
         dictionary = {
             "account": "rH6ZiHU1PGamME2LvVTxrgvfjQpppWKGmr",
             "fee": "10",
@@ -210,7 +240,7 @@ def test_from_dict_trust_set(self):
         actual = TrustSet.from_dict(dictionary)
         self.assertEqual(actual, expected)
 
-    def test_from_dict_list_of_lists(self):
+    def test_list_of_lists(self):
         path_step_dict = {"account": "rH6ZiHU1PGamME2LvVTxrgvfjQpppWKGmr"}
         path_find_dict = {
             "subcommand": PathFindSubcommand.CREATE,
@@ -230,7 +260,7 @@ def test_from_dict_list_of_lists(self):
         actual = PathFind.from_dict(path_find_dict)
         self.assertEqual(actual, expected)
 
-    def test_from_dict_any(self):
+    def test_any(self):
         account_channels_dict = {
             "account": "rH6ZiHU1PGamME2LvVTxrgvfjQpppWKGmr",
             "marker": "something",
@@ -239,7 +269,7 @@ def test_from_dict_any(self):
         actual = AccountChannels.from_dict(account_channels_dict)
         self.assertEqual(actual, expected)
 
-    def test_from_dict_bad_str(self):
+    def test_bad_str(self):
         dictionary = {
             "account": "rH6ZiHU1PGamME2LvVTxrgvfjQpppWKGmr",
             "fee": 10,  # this should be a str instead ("10")
@@ -254,7 +284,7 @@ def test_from_dict_bad_str(self):
         with self.assertRaises(XRPLModelException):
             TrustSet.from_dict(dictionary)
 
-    def test_from_dict_explicit_none(self):
+    def test_explicit_none(self):
         dictionary = {
             "account": "rH6ZiHU1PGamME2LvVTxrgvfjQpppWKGmr",
             "fee": "10",
@@ -277,7 +307,7 @@ def test_from_dict_explicit_none(self):
         actual = TrustSet.from_dict(dictionary)
         self.assertEqual(actual, expected)
 
-    def test_from_dict_with_str_enum_value(self):
+    def test_with_str_enum_value(self):
         dictionary = {
             "method": "account_channels",
             "account": "rH6ZiHU1PGamME2LvVTxrgvfjQpppWKGmr",
@@ -290,7 +320,7 @@ def test_from_dict_with_str_enum_value(self):
         actual = AccountChannels.from_dict(dictionary)
         self.assertEqual(actual, expected)
 
-    def test_from_dict_bad_list(self):
+    def test_bad_list(self):
         dictionary = {
             "account": "rpqBNcDpWaqZC2Rksayf8UyG66Fyv2JTQy",
             "fee": "10",
@@ -307,7 +337,7 @@ def test_from_dict_bad_list(self):
         with self.assertRaises(XRPLModelException):
             SignerListSet.from_dict(dictionary)
 
-    def test_from_dict_multisign(self):
+    def test_multisign(self):
         txn_sig1 = (
             "F80E201FE295AA08678F8542D8FC18EA18D582A0BD19BE77B9A24479418ADBCF4CAD28E7BD"
             "96137F88DE7736827C7AC6204FBA8DDADB7394E6D704CD1F4CD609"
@@ -379,7 +409,7 @@ def test_from_dict_multisign(self):
         actual = Request.from_dict(request)
         self.assertEqual(actual, expected)
 
-    def test_from_dict_submit(self):
+    def test_submit(self):
         blob = "SOISUSF9SD0839W8U98J98SF"
         id_val = "submit_786514"
         request = {
@@ -392,49 +422,83 @@ def test_from_dict_submit(self):
         actual = Request.from_dict(request)
         self.assertEqual(actual, expected)
 
-    # Note: BaseModel.from_xrpl and its overridden methods accept only camelCase or
-    # PascalCase inputs (i.e. snake_case is not accepted)
-    def test_request_input_from_xrpl_accepts_camel_case(self):
-        request = {
-            "method": "submit",
-            "tx_json": {
-                "Account": "rnD6t3JF9RTG4VgNLoc4i44bsQLgJUSi6h",
-                "transaction_type": "TrustSet",
-                "Fee": "10",
-                "Sequence": 17896798,
-                "Flags": 131072,
-                "signing_pub_key": "",
-                "limit_amount": {
-                    "currency": "USD",
-                    "issuer": "rH5gvkKxGHrFAMAACeu9CB3FMu7pQ9jfZm",
-                    "value": "10",
-                },
+    def test_nonexistent_field(self):
+        tx = {
+            "account": "rH6ZiHU1PGamME2LvVTxrgvfjQpppWKGmr",
+            "bad_field": "random",
+            "flags": 131072,
+            "limit_amount": {
+                "currency": "USD",
+                "issuer": "raoV5dkC66XvGWjSzUhCUuuGM3YFTitMxT",
+                "value": "100",
             },
-            "fail_hard": False,
         }
+        with self.assertRaises(XRPLModelException):
+            TrustSet.from_dict(tx)
 
+    def test_bad_literal(self):
+        tx = {
+            "account": issuer,
+            "xchain_bridge": {
+                "locking_chain_door": issuer,
+                "locking_chain_issue": {"currency": "XRP"},
+                "issuing_chain_door": issuer,
+                "issuing_chain_issue": {"currency": "XRP"},
+            },
+            "public_key": "0342E083EA762D91D621714C394",
+            "signature": "3044022053B26DAAC9C886192C95",
+            "other_chain_source": issuer,
+            "amount": amount_dict,
+            "attestation_reward_account": issuer,
+            "attestation_signer_account": issuer,
+            "was_locking_chain_send": 2,  # supposed to be 0 or 1
+            "xchain_account_create_count": 12,
+            "destination": issuer,
+            "signature_reward": "200",
+        }
         with self.assertRaises(XRPLModelException):
-            Request.from_xrpl(request)
+            XChainAddAccountCreateAttestation.from_dict(tx)
 
-    def test_transaction_input_from_xrpl_accepts_only_camel_case(self):
-        # verify that Transaction.from_xrpl method does not accept snake_case JSON keys
-        tx_snake_case_keys = {
-            "Account": "rnoGkgSpt6AX1nQxZ2qVGx7Fgw6JEcoQas",
-            "transaction_type": "TrustSet",
-            "Fee": "10",
-            "Sequence": 17892983,
-            "Flags": 131072,
-            "signing_pub_key": "",
-            "limit_amount": {
-                "currency": "USD",
-                "issuer": "rBPvTKisx7UCGLDtiUZ6mDssXNREuVuL8Y",
-                "value": "10",
+    def test_good_literal(self):
+        tx = {
+            "account": issuer,
+            "xchain_bridge": {
+                "locking_chain_door": issuer,
+                "locking_chain_issue": {"currency": "XRP"},
+                "issuing_chain_door": issuer,
+                "issuing_chain_issue": {"currency": "XRP"},
             },
+            "public_key": "0342E083EA762D91D621714C394",
+            "signature": "3044022053B26DAAC9C886192C95",
+            "other_chain_source": issuer,
+            "amount": "100",
+            "attestation_reward_account": issuer,
+            "attestation_signer_account": issuer,
+            "was_locking_chain_send": 1,
+            "xchain_account_create_count": 12,
+            "destination": issuer,
+            "signature_reward": "200",
         }
+        expected_dict = {
+            **tx,
+            "xchain_bridge": XChainBridge.from_dict(tx["xchain_bridge"]),
+        }
+        expected = XChainAddAccountCreateAttestation(
+            **expected_dict,
+        )
+        self.assertEqual(XChainAddAccountCreateAttestation.from_dict(tx), expected)
+
+    def test_enum(self):
+        path_find_dict = {
+            "subcommand": "create",
+            "source_account": "raoV5dkC66XvGWjSzUhCUuuGM3YFTitMxT",
+            "destination_account": "rJjusz1VauNA9XaHxJoiwHe38bmQFz1sUV",
+            "destination_amount": "100",
+        }
+        self.assertEqual(PathFind.from_dict(path_find_dict), PathFind(**path_find_dict))
 
-        with self.assertRaises(XRPLModelException):
-            Transaction.from_xrpl(tx_snake_case_keys)
 
+class TestFromXrpl(TestCase):
     def test_from_xrpl(self):
         dirname = os.path.dirname(__file__)
         full_filename = "x-codec-fixtures.json"
@@ -444,14 +508,18 @@ def test_from_xrpl(self):
             for test in fixtures_json["transactions"]:
                 x_json = test["xjson"]
                 r_json = test["rjson"]
-                with self.subTest(json=x_json):
+                with self.subTest(json=x_json, use_json=False):
                     tx = Transaction.from_xrpl(x_json)
                     translated_tx = tx.to_xrpl()
                     self.assertEqual(x_json, translated_tx)
-                with self.subTest(json=r_json):
+                with self.subTest(json=r_json, use_json=False):
                     tx = Transaction.from_xrpl(r_json)
                     translated_tx = tx.to_xrpl()
                     self.assertEqual(r_json, translated_tx)
+                with self.subTest(json=r_json, use_json=True):
+                    tx = Transaction.from_xrpl(json.dumps(r_json))
+                    translated_tx = tx.to_xrpl()
+                    self.assertEqual(r_json, translated_tx)
 
     def test_from_xrpl_signers(self):
         txn_sig1 = (
@@ -749,3 +817,46 @@ def test_to_from_xrpl_xchain(self):
         )
         self.assertEqual(tx_obj.to_xrpl(), tx_json)
         self.assertEqual(Transaction.from_xrpl(tx_json), tx_obj)
+
+    def test_request_input_from_xrpl_accepts_camel_case(self):
+        # Note: BaseModel.from_xrpl and its overridden methods accept only camelCase or
+        # PascalCase inputs (i.e. snake_case is not accepted)
+        request = {
+            "method": "submit",
+            "tx_json": {
+                "Account": "rnD6t3JF9RTG4VgNLoc4i44bsQLgJUSi6h",
+                "transaction_type": "TrustSet",
+                "Fee": "10",
+                "Sequence": 17896798,
+                "Flags": 131072,
+                "signing_pub_key": "",
+                "limit_amount": {
+                    "currency": "USD",
+                    "issuer": "rH5gvkKxGHrFAMAACeu9CB3FMu7pQ9jfZm",
+                    "value": "10",
+                },
+            },
+            "fail_hard": False,
+        }
+
+        with self.assertRaises(XRPLModelException):
+            Request.from_xrpl(request)
+
+    def test_transaction_input_from_xrpl_accepts_only_camel_case(self):
+        # verify that Transaction.from_xrpl method does not accept snake_case JSON keys
+        tx_snake_case_keys = {
+            "Account": "rnoGkgSpt6AX1nQxZ2qVGx7Fgw6JEcoQas",
+            "transaction_type": "TrustSet",
+            "Fee": "10",
+            "Sequence": 17892983,
+            "Flags": 131072,
+            "signing_pub_key": "",
+            "limit_amount": {
+                "currency": "USD",
+                "issuer": "rBPvTKisx7UCGLDtiUZ6mDssXNREuVuL8Y",
+                "value": "10",
+            },
+        }
+
+        with self.assertRaises(XRPLModelException):
+            Transaction.from_xrpl(tx_snake_case_keys)
diff --git a/tests/unit/models/transactions/test_check_cash.py b/tests/unit/models/transactions/test_check_cash.py
index 4fadb8537..aa3fca77d 100644
--- a/tests/unit/models/transactions/test_check_cash.py
+++ b/tests/unit/models/transactions/test_check_cash.py
@@ -6,7 +6,7 @@
 _ACCOUNT = "r9LqNeG6qHxjeUocjvVki2XR35weJ9mZgQ"
 _FEE = "0.00001"
 _SEQUENCE = 19048
-_CHECK_ID = 19048
+_CHECK_ID = "838766BA2B995C00744175F69A1B11E32C3DBC40E64801A4056FCBD657F57334"
 _AMOUNT = "300"
 
 
diff --git a/tests/unit/models/transactions/test_oracle_set.py b/tests/unit/models/transactions/test_oracle_set.py
index efd106d41..a694fd1e8 100644
--- a/tests/unit/models/transactions/test_oracle_set.py
+++ b/tests/unit/models/transactions/test_oracle_set.py
@@ -326,7 +326,7 @@ def test_early_last_update_time_field(self):
         self.assertEqual(
             err.exception.args[0],
             "{'last_update_time': 'LastUpdateTime"
-            + " must be greater than or equal to Ripple-Epoch 946684800.0 seconds'}",
+            + " must be greater than or equal to ripple epoch - 946684800 seconds'}",
         )
 
     # Validity depends on the time of the Last Closed Ledger. This test verifies the
diff --git a/tests/unit/models/transactions/test_xchain_claim.py b/tests/unit/models/transactions/test_xchain_claim.py
index 82f9e690d..eb3d9efef 100644
--- a/tests/unit/models/transactions/test_xchain_claim.py
+++ b/tests/unit/models/transactions/test_xchain_claim.py
@@ -68,7 +68,7 @@ def test_successful_claim_destination_tag(self):
             xchain_bridge=_XRP_BRIDGE,
             xchain_claim_id=_CLAIM_ID,
             destination=_DESTINATION,
-            destination_tag="12345",
+            destination_tag=12345,
             amount=_XRP_AMOUNT,
         )
 
diff --git a/xrpl/models/base_model.py b/xrpl/models/base_model.py
index 84c0416fc..19ae1f911 100644
--- a/xrpl/models/base_model.py
+++ b/xrpl/models/base_model.py
@@ -291,6 +291,67 @@ def is_valid(self: Self) -> bool:
         """
         return len(self._get_errors()) == 0
 
+    def _check_type(
+        self: Self, attr: str, value: Any, expected_type: Type[Any]
+    ) -> Dict[str, str]:
+        """
+        Returns error dictionary if the type of `value` does not match the
+        `expected_type`.
+        """
+        expected_type_origin = get_origin(expected_type)
+        if expected_type_origin is Union:
+            if any(
+                len(self._check_type(attr, value, expected_type_option)) == 0
+                for expected_type_option in get_args(expected_type)
+            ):
+                return {}
+            return {attr: f"{attr} is {type(value)}, expected {expected_type}"}
+
+        # unsure what the problem with mypy is here
+        if expected_type is Any:  # type: ignore[comparison-overlap]
+            return {}
+
+        if expected_type_origin is list:
+            # expected a List, received a List
+            if not isinstance(value, list):
+                return {attr: f"{attr} is {type(value)}, expected {expected_type}"}
+            result = {}
+            for i in range(len(value)):
+                result.update(
+                    self._check_type(
+                        f"{attr}[{i}]", value[i], get_args(expected_type)[0]
+                    )
+                )
+            return result
+
+        if expected_type_origin is dict:
+            return (
+                {}
+                if isinstance(value, dict)
+                else {attr: f"{attr} is {type(value)}, expected {expected_type}"}
+            )
+
+        if isinstance(expected_type, type) and issubclass(expected_type, Enum):
+            return (
+                {}
+                if value in list(expected_type)
+                else {
+                    attr: f"{attr} is {value}, expected member of {expected_type} enum"
+                }
+            )
+
+        if expected_type_origin is Literal:
+            arg = get_args(expected_type)
+            return {} if value in arg else {attr: f"{attr} is {value}, expected {arg}"}
+
+        if issubclass(expected_type, BaseModel) and isinstance(value, dict):
+            return {}
+
+        if not isinstance(value, expected_type):
+            return {attr: f"{attr} is {type(value)}, expected {expected_type}"}
+
+        return {}
+
     def _get_errors(self: Self) -> Dict[str, str]:
         """
         Extended in subclasses to define custom validation logic.
@@ -298,11 +359,14 @@ def _get_errors(self: Self) -> Dict[str, str]:
         Returns:
             Dictionary of any errors found on self.
         """
-        return {
-            attr: f"{attr} is not set"
-            for attr, value in self.__dict__.items()
-            if value is REQUIRED
-        }
+        class_types = get_type_hints(self.__class__)
+        result: Dict[str, str] = {}
+        for attr, value in self.__dict__.items():
+            if value is REQUIRED:
+                result[attr] = f"{attr} is not set"
+            else:
+                result.update(self._check_type(attr, value, class_types[attr]))
+        return result
 
     def to_dict(self: Self) -> Dict[str, Any]:
         """
@@ -339,6 +403,6 @@ def __eq__(self: Self, other: object) -> bool:
         return isinstance(other, BaseModel) and self.to_dict() == other.to_dict()
 
     def __repr__(self: Self) -> str:
-        """Returns a string representation of a BaseModel object"""
+        """Returns a string representation of a BaseModel object."""
         repr_items = [f"{key}={repr(value)}" for key, value in self.to_dict().items()]
         return f"{type(self).__name__}({repr_items})"
diff --git a/xrpl/models/requests/ledger_entry.py b/xrpl/models/requests/ledger_entry.py
index 9e92650d0..44a735b39 100644
--- a/xrpl/models/requests/ledger_entry.py
+++ b/xrpl/models/requests/ledger_entry.py
@@ -256,9 +256,9 @@ class LedgerEntry(Request, LookupByLedgerRequest):
     ticket: Optional[Union[str, Ticket]] = None
     bridge_account: Optional[str] = None
     bridge: Optional[XChainBridge] = None
-    xchain_claim_id: Optional[Union[str, XChainClaimID]] = None
+    xchain_claim_id: Optional[Union[int, str, XChainClaimID]] = None
     xchain_create_account_claim_id: Optional[
-        Union[str, XChainCreateAccountClaimID]
+        Union[int, str, XChainCreateAccountClaimID]
     ] = None
 
     binary: bool = False
diff --git a/xrpl/models/transactions/oracle_set.py b/xrpl/models/transactions/oracle_set.py
index 17b7f0147..f2840ff13 100644
--- a/xrpl/models/transactions/oracle_set.py
+++ b/xrpl/models/transactions/oracle_set.py
@@ -20,10 +20,10 @@
 MAX_ORACLE_SYMBOL_CLASS = 16
 
 # epoch offset must equal 946684800 seconds. It represents the diff between the
-# genesis of Unix time and Ripple-Epoch time
-EPOCH_OFFSET = (
-    datetime.datetime(2000, 1, 1) - datetime.datetime(1970, 1, 1)
-).total_seconds()
+# genesis of Unix time and ripple epoch time
+EPOCH_OFFSET = int(
+    (datetime.datetime(2000, 1, 1) - datetime.datetime(1970, 1, 1)).total_seconds()
+)
 
 
 @require_kwargs_on_init
@@ -146,7 +146,7 @@ def _get_errors(self: Self) -> Dict[str, str]:
         if self.last_update_time < EPOCH_OFFSET:
             errors["last_update_time"] = (
                 "LastUpdateTime must be greater than or equal"
-                f" to Ripple-Epoch {EPOCH_OFFSET} seconds"
+                f" to ripple epoch - {EPOCH_OFFSET} seconds"
             )
 
         return errors
diff --git a/xrpl/models/transactions/pseudo_transactions/enable_amendment.py b/xrpl/models/transactions/pseudo_transactions/enable_amendment.py
index 180ed56de..5b03cf659 100644
--- a/xrpl/models/transactions/pseudo_transactions/enable_amendment.py
+++ b/xrpl/models/transactions/pseudo_transactions/enable_amendment.py
@@ -2,7 +2,7 @@
 
 from dataclasses import dataclass, field
 from enum import Enum
-from typing import List, Optional, Union
+from typing import Dict, List, Optional, Union
 
 from xrpl.models.flags import FlagInterface
 from xrpl.models.required import REQUIRED
@@ -101,7 +101,7 @@ class EnableAmendment(PseudoTransaction):
         init=False,
     )
 
-    flags: Union[int, List[int]] = 0
+    flags: Union[Dict[str, bool], int, List[int]] = 0
     """
     The Flags value of the EnableAmendment pseudo-transaction indicates the status
     of the amendment at the time of the ledger including the pseudo-transaction.
diff --git a/xrpl/models/transactions/transaction.py b/xrpl/models/transactions/transaction.py
index ea25aab8c..c582222e5 100644
--- a/xrpl/models/transactions/transaction.py
+++ b/xrpl/models/transactions/transaction.py
@@ -251,9 +251,6 @@ class Transaction(BaseModel):
     """The network id of the transaction."""
 
     def _get_errors(self: Self) -> Dict[str, str]:
-        # import must be here to avoid circular dependencies
-        from xrpl.wallet.main import Wallet
-
         errors = super()._get_errors()
         if self.ticket_sequence is not None and (
             (self.sequence is not None and self.sequence != 0)
@@ -264,9 +261,6 @@ def _get_errors(self: Self) -> Dict[str, str]:
             ] = """If ticket_sequence is provided,
             account_txn_id must be None and sequence must be None or 0"""
 
-        if isinstance(self.account, Wallet):
-            errors["account"] = "Must pass in `wallet.address`, not `wallet`."
-
         return errors
 
     def to_dict(self: Self) -> Dict[str, Any]:
@@ -371,6 +365,9 @@ def has_flag(self: Self, flag: int) -> bool:
 
         Returns:
             Whether the transaction has the given flag value set.
+
+        Raises:
+            XRPLModelException: if `self.flags` is invalid.
         """
         if isinstance(self.flags, int):
             return self.flags & flag != 0
@@ -379,8 +376,10 @@ def has_flag(self: Self, flag: int) -> bool:
                 tx_type=self.transaction_type,
                 tx_flags=self.flags,
             )
-        else:  # is List[int]
+        elif isinstance(self.flags, list):
             return flag in self.flags
+        else:
+            raise XRPLModelException("self.flags is not an int, dict, or list")
 
     def is_signed(self: Self) -> bool:
         """
diff --git a/xrpl/utils/xrp_conversions.py b/xrpl/utils/xrp_conversions.py
index d8aa2cf3c..5eaaa4829 100644
--- a/xrpl/utils/xrp_conversions.py
+++ b/xrpl/utils/xrp_conversions.py
@@ -1,4 +1,5 @@
 """Conversions between XRP drops and native number types."""
+
 import re
 from decimal import Decimal, InvalidOperation, localcontext
 from typing import Pattern, Union
@@ -35,7 +36,7 @@ def xrp_to_drops(xrp: Union[int, float, Decimal]) -> str:
         TypeError: if ``xrp`` is given as a string
         XRPRangeException: if the given amount of XRP is invalid
     """
-    if type(xrp) == str:  # type: ignore
+    if isinstance(xrp, str):
         # This protects people from passing drops to this function and getting
         # a million times as many drops back.
         raise TypeError(
@@ -83,7 +84,7 @@ def drops_to_xrp(drops: str) -> Decimal:
         TypeError: if ``drops`` not given as a string
         XRPRangeException: if the given number of drops is invalid
     """
-    if type(drops) != str:
+    if not isinstance(drops, str):
         raise TypeError(f"Drops must be provided as string (got {type(drops)})")
     drops = drops.strip()
     with localcontext(DROPS_DECIMAL_CONTEXT):