diff --git a/.github/workflows/mantle_finalize_round.yml b/.github/workflows/mantle_finalize_round.yml
index 1298cd77c..0ccf766d7 100644
--- a/.github/workflows/mantle_finalize_round.yml
+++ b/.github/workflows/mantle_finalize_round.yml
@@ -22,7 +22,6 @@ on:
 
 env:
   NODE_VERSION: 16.x
-  NETWORK: "arbitrum-goerli"
   COORDINATOR_ETH_PK: ${{ secrets.MANTLE_TESTNET_COORDINATOR_WALLET_PRIVATE_KEY }}
   COORDINATOR_PK: ${{ secrets.MANTLE_TESTNET_COORDINATOR_MACI_PRIVATE_KEY }}
 
@@ -69,8 +68,8 @@ jobs:
         echo "MACI_START_BLOCK:" $MACI_START_BLOCK
         # tally and finalize
         cd contracts
-        yarn hardhat tally --round-address "${ROUND_ADDRESS}" --network "${NETWORK}"
+        yarn hardhat tally --round-address "${ROUND_ADDRESS}" --network "${{ github.event.inputs.network }}"
         curl --location --request POST 'https://api.pinata.cloud/pinning/pinFileToIPFS' \
           --header "Authorization: Bearer ${{ secrets.PINATA_JWT }}" \
           --form 'file=@"tally.json"'
-        yarn hardhat run --network "${NETWORK}" scripts/finalize.ts
+        yarn hardhat run --network "${{ github.event.inputs.network }}" scripts/finalize.ts
diff --git a/.github/workflows/mantle_new_recipient_registry.yml b/.github/workflows/mantle_new_recipient_registry.yml
new file mode 100644
index 000000000..d2d65b8e9
--- /dev/null
+++ b/.github/workflows/mantle_new_recipient_registry.yml
@@ -0,0 +1,43 @@
+name: Mantle testnet - New Recipient Registry
+
+on:
+  workflow_dispatch:
+    inputs:
+      branch_name:
+        description: 'Clrfund branch name'
+        required: true
+        default: 'cohort/EthSingapore'
+      factory:
+        description: 'Clrfund factory address'
+        required: true
+        default: '0x006f39E6a6D15323334Be1db34C73088550BB20a'
+      network:
+        description: 'Network'
+        required: true
+        default: 'mantle-testnet'
+
+env:
+  NODE_VERSION: 16.x
+  WALLET_PRIVATE_KEY: ${{ secrets.MANTLE_TESTNET_COORDINATOR_WALLET_PRIVATE_KEY }}
+
+jobs:
+  new-recipient-registry:
+    runs-on: ubuntu-22.04
+    steps:
+    - name: Use Node.js ${{ env.NODE_VERSION }}
+      uses: actions/setup-node@v3
+      with:
+        node-version: ${{ env.NODE_VERSION }}
+    - name: Checkout source code
+      uses: actions/checkout@v3
+    - name: Build CLR
+      run: |
+        yarn && yarn build
+    - name: Create new recipient registry
+      run: |
+        cd contracts
+        export FACTORY_ADDRESS="${{ github.event.inputs.factory }}"
+        yarn hardhat deploy-recipient-registry \
+          --network "${{ github.event.inputs.network }}" \
+          --factory "${{ github.event.inputs.factory }}" \
+          --type "optimistic"
diff --git a/contracts/tasks/deployRecipientRegistry.ts b/contracts/tasks/deployRecipientRegistry.ts
new file mode 100644
index 000000000..0a8662585
--- /dev/null
+++ b/contracts/tasks/deployRecipientRegistry.ts
@@ -0,0 +1,76 @@
+/**
+ * Deploy a new recipient registry
+ *
+ * Sample usage:
+ *
+ * yarn hardhat deploy-recipient-registry \
+ *  --network arbitrum-goerli \
+ *  --factory 0x85802c7871e7e778Ec376F097b56BD7299250b8D \
+ *  --type optimistic
+ */
+import { task, types } from 'hardhat/config'
+import { Contract } from 'ethers'
+
+// Number.MAX_SAFE_INTEGER - 1
+const challengePeriodSeconds = 9007199254740990
+
+task('deploy-recipient-registry', 'Deploy a new recipient registry')
+  .addParam('factory', 'The funding round factory contract address')
+  .addParam(
+    'type',
+    'The recipient registry type, e.g. simple, optimistic',
+    'optimistic'
+  )
+  .addOptionalParam(
+    'deposit',
+    'The base deposit for optimistic recipient registry',
+    '0.001'
+  )
+  .addOptionalParam(
+    'challengePeriod',
+    'The challenge period in seconds for optimistic recipient registry',
+    challengePeriodSeconds,
+    types.int
+  )
+  .setAction(
+    async ({ factory, type, deposit, challengePeriod }, { ethers }) => {
+      const [deployer] = await ethers.getSigners()
+      const fundingRoundFactory = await ethers.getContractAt(
+        'FundingRoundFactory',
+        factory
+      )
+
+      let recipientRegistry: Contract
+      if (type === 'simple') {
+        const SimpleRecipientRegistry = await ethers.getContractFactory(
+          'SimpleRecipientRegistry',
+          deployer
+        )
+        recipientRegistry = await SimpleRecipientRegistry.deploy(
+          fundingRoundFactory.address
+        )
+      } else if (type === 'optimistic') {
+        const OptimisticRecipientRegistry = await ethers.getContractFactory(
+          'OptimisticRecipientRegistry',
+          deployer
+        )
+        recipientRegistry = await OptimisticRecipientRegistry.deploy(
+          ethers.utils.parseUnits(deposit),
+          challengePeriod,
+          fundingRoundFactory.address
+        )
+      } else {
+        throw new Error('unsupported recipient registry type')
+      }
+
+      await recipientRegistry.deployTransaction.wait()
+      console.log(`Recipient registry deployed: ${recipientRegistry.address}`)
+
+      const setRecipientRegistryTx =
+        await fundingRoundFactory.setRecipientRegistry(
+          recipientRegistry.address
+        )
+      await setRecipientRegistryTx.wait()
+      console.log('Done!')
+    }
+  )