diff --git a/src/db/models/SavedFilter.ts b/src/db/models/SavedFilter.ts
index 8c62068..aecb49b 100644
--- a/src/db/models/SavedFilter.ts
+++ b/src/db/models/SavedFilter.ts
@@ -22,15 +22,15 @@ export interface ISavedFilterInput extends ISavedFilterAttributes {}
 export interface ISavedFilterOutput extends ISavedFilterAttributes {}
 
 class SavedFilterModel extends Model<ISavedFilterAttributes, ISavedFilterInput> implements ISavedFilterAttributes {
-    public id!: string;
-    public keycloak_id!: string;
-    public title!: string;
-    public tag!: string;
-    public queries!: any[];
-    public type!: string;
-    public creation_date!: Date;
-    public updated_date!: Date;
-    public favorite!: boolean;
+    public id: string;
+    public keycloak_id: string;
+    public title: string;
+    public tag: string;
+    public queries: any[];
+    public type: string;
+    public creation_date: Date;
+    public updated_date: Date;
+    public favorite: boolean;
 }
 
 SavedFilterModel.init(
diff --git a/src/db/models/User.ts b/src/db/models/User.ts
index 07a8787..edb21df 100644
--- a/src/db/models/User.ts
+++ b/src/db/models/User.ts
@@ -39,14 +39,14 @@ export interface IUserInput extends IUserAttributes {}
 export interface IUserOuput extends IUserAttributes {}
 
 class UserModel extends Model<IUserAttributes, IUserInput> implements IUserAttributes {
-    public id!: number;
-    public keycloak_id!: string;
+    public id: number;
+    public keycloak_id: string;
     public commercial_use_reason: string;
     public accepted_terms: boolean;
     public understand_disclaimer: boolean;
     public completed_registration: boolean;
-    public creation_date!: Date;
-    public updated_date!: Date;
+    public creation_date: Date;
+    public updated_date: Date;
     public deleted: boolean;
     public roles: string[];
     public portal_usages: string[];
@@ -144,7 +144,7 @@ UserModel.init(
         affiliation: {
             type: DataTypes.CITEXT,
             validate: {
-                isAlphanumeric: true,
+                is: NAME_REGEX,
             },
         },
         public_email: {
diff --git a/src/db/models/UserSets.ts b/src/db/models/UserSets.ts
index 83f75bb..1892fae 100644
--- a/src/db/models/UserSets.ts
+++ b/src/db/models/UserSets.ts
@@ -1,6 +1,6 @@
 import { DataTypes, Model } from 'sequelize';
 
-import { UUID_VERSION } from '../../utils/constants';
+import { NAME_REGEX, UUID_VERSION } from '../../utils/constants';
 import sequelizeConnection from '../config';
 
 interface IUserSetAttributes {
@@ -19,13 +19,13 @@ export interface IUserSetsInput extends IUserSetAttributes {}
 export interface IUserSetsOutput extends IUserSetAttributes {}
 
 class UserSetModel extends Model<IUserSetAttributes, IUserSetsInput> implements IUserSetAttributes {
-    public id!: string;
-    public keycloak_id!: string;
-    public content!: any;
-    public alias!: string;
-    public sharedpublicly!: boolean;
-    public creation_date!: Date;
-    public updated_date!: Date;
+    public id: string;
+    public keycloak_id: string;
+    public content: any;
+    public alias: string;
+    public sharedpublicly: boolean;
+    public creation_date: Date;
+    public updated_date: Date;
 }
 
 UserSetModel.init(
@@ -50,7 +50,7 @@ UserSetModel.init(
             type: DataTypes.STRING,
             allowNull: false,
             validate: {
-                isAlpha: true,
+                is: NAME_REGEX,
             },
         },
         sharedpublicly: {
diff --git a/src/utils/constants.ts b/src/utils/constants.ts
index a0f2feb..0ae40d3 100644
--- a/src/utils/constants.ts
+++ b/src/utils/constants.ts
@@ -1,3 +1,3 @@
 export const UUID_VERSION = 4;
-export const NAME_REGEX = /^[a-zA-ZÀ-ÿ0-9- ]+$/;
+export const NAME_REGEX = /^[a-zà-ÿ ,.'-_]+$/iu;
 export const MAX_LENGTH_PER_ROLE = 35;