diff --git a/src/modules/ad/domain/dtos/create-ad.request.ts b/src/modules/ad/domain/dtos/create-ad.request.ts
index 672d698..8284cac 100644
--- a/src/modules/ad/domain/dtos/create-ad.request.ts
+++ b/src/modules/ad/domain/dtos/create-ad.request.ts
@@ -1,7 +1,6 @@
 import { AutoMap } from '@automapper/classes';
 import {
   IsOptional,
-  IsString,
   IsBoolean,
   IsDate,
   IsInt,
@@ -20,6 +19,7 @@ import { ScheduleDTO } from './create.schedule.dto';
 import { AddressDTO } from './create.address.dto';
 import { HasProperPassengerSeats } from './utils/has-passenger-seats.validator';
 import { HasProperDriverSeats } from './utils/has-driver-seats.validator';
+import { HasProperPositionIndexes } from './utils/address-position.validator';
 
 export class CreateAdRequest {
   @IsOptional()
@@ -27,6 +27,7 @@ export class CreateAdRequest {
   @AutoMap()
   uuid?: string;
 
+  // TODO create validation rule to verify is user exists ??
   @IsUUID(4)
   @AutoMap()
   userUuid: string;
@@ -97,6 +98,8 @@ export class CreateAdRequest {
   strict?: boolean;
 
   @ArrayMinSize(2)
+  @Type(() => AddressDTO)
+  @HasProperPositionIndexes()
   @ValidateNested({ each: true })
   @AutoMap(() => [AddressDTO])
   addresses: AddressDTO[];
diff --git a/src/modules/ad/domain/dtos/create.address.dto.ts b/src/modules/ad/domain/dtos/create.address.dto.ts
index 18872f7..17a7b79 100644
--- a/src/modules/ad/domain/dtos/create.address.dto.ts
+++ b/src/modules/ad/domain/dtos/create.address.dto.ts
@@ -19,9 +19,10 @@ export class AddressDTO {
   @AutoMap()
   adUuid?: string;
 
+  @IsOptional()
   @IsInt()
   @AutoMap()
-  position: number;
+  position?: number;
 
   @IsLongitude()
   @AutoMap()
diff --git a/src/modules/ad/domain/dtos/utils/address-position.validator.ts b/src/modules/ad/domain/dtos/utils/address-position.validator.ts
new file mode 100644
index 0000000..1452f0f
--- /dev/null
+++ b/src/modules/ad/domain/dtos/utils/address-position.validator.ts
@@ -0,0 +1,35 @@
+import { ValidateBy, ValidationOptions, buildMessage } from 'class-validator';
+import { AddressDTO } from '../create.address.dto';
+
+export function hasProperPositionIndexes(value: AddressDTO[]) {
+  if (value.every((address) => address.position === undefined)) return true;
+  else if (value.every((address) => typeof address.position === 'number')) {
+    value.sort((a, b) => a.position - b.position);
+    for (let i = 1; i < value.length; i++) {
+      if (value[i - 1].position >= value[i].position) return false;
+    }
+    return true;
+  }
+  return false;
+}
+
+export function HasProperPositionIndexes(
+  validationOptions?: ValidationOptions,
+): PropertyDecorator {
+  return ValidateBy(
+    {
+      name: '',
+      constraints: [],
+      validator: {
+        validate: (value: AddressDTO[]): boolean =>
+          hasProperPositionIndexes(value),
+        defaultMessage: buildMessage(
+          () =>
+            `indexes position incorrect, please provide a complete list of indexes or ordened list of adresses from start to end of journey`,
+          validationOptions,
+        ),
+      },
+    },
+    validationOptions,
+  );
+}
diff --git a/src/modules/ad/domain/entities/ad.ts b/src/modules/ad/domain/entities/ad.ts
index 1d3f04e..865070d 100644
--- a/src/modules/ad/domain/entities/ad.ts
+++ b/src/modules/ad/domain/entities/ad.ts
@@ -8,17 +8,16 @@ import {
   IsEnum,
   ValidateNested,
   ArrayMinSize,
+  IsUUID,
 } from 'class-validator';
 import { Address } from '../entities/address';
 import { Frequency } from '../types/frequency.enum';
-import { Type } from 'class-transformer';
-
 export class Ad {
-  @IsString()
+  @IsUUID(4)
   @AutoMap()
   uuid: string;
 
-  @IsString()
+  @IsUUID(4)
   @AutoMap()
   userUuid: string;
 
diff --git a/src/modules/ad/tests/unit/has-proper-addresses-indexes.spec.ts b/src/modules/ad/tests/unit/has-proper-addresses-indexes.spec.ts
new file mode 100644
index 0000000..9010706
--- /dev/null
+++ b/src/modules/ad/tests/unit/has-proper-addresses-indexes.spec.ts
@@ -0,0 +1,70 @@
+import { AddressDTO } from '../../domain/dtos/create.address.dto';
+import { hasProperPositionIndexes } from '../../domain/dtos/utils/address-position.validator';
+describe('addresses position validators', () => {
+  const mockAddress1: AddressDTO = {
+    lon: 48.68944505415954,
+    lat: 6.176510296462267,
+    houseNumber: '5',
+    street: 'Avenue Foch',
+    locality: 'Nancy',
+    postalCode: '54000',
+    country: 'France',
+  };
+  const mockAddress2: AddressDTO = {
+    lon: 48.8566,
+    lat: 2.3522,
+    locality: 'Paris',
+    postalCode: '75000',
+    country: 'France',
+  };
+
+  const mockAddress3: AddressDTO = {
+    lon: 49.2628,
+    lat: 4.0347,
+    locality: 'Reims',
+    postalCode: '51454',
+    country: 'France',
+  };
+  it('should validate if none of position is definded ', () => {
+    expect(
+      hasProperPositionIndexes([mockAddress1, mockAddress2, mockAddress3]),
+    ).toBeTruthy();
+  });
+  it('should throw an error if position are partialy defined ', () => {
+    mockAddress1.position = 0;
+    expect(
+      hasProperPositionIndexes([mockAddress1, mockAddress2, mockAddress3]),
+    ).toBeFalsy();
+  });
+  it('should throw an error if position are partialy defined ', () => {
+    mockAddress1.position = 0;
+    mockAddress2.position = null;
+    mockAddress3.position = undefined;
+    expect(
+      hasProperPositionIndexes([mockAddress1, mockAddress2, mockAddress3]),
+    ).toBeFalsy();
+  });
+
+  it('should throw an error if positions are not incremented  ', () => {
+    mockAddress1.position = 0;
+    mockAddress2.position = 1;
+    mockAddress3.position = 1;
+    expect(
+      hasProperPositionIndexes([mockAddress1, mockAddress2, mockAddress3]),
+    ).toBeFalsy();
+  });
+  it('should validate if all positions are defined and incremented', () => {
+    mockAddress1.position = 0;
+    mockAddress2.position = 1;
+    mockAddress3.position = 2;
+    expect(
+      hasProperPositionIndexes([mockAddress1, mockAddress2, mockAddress3]),
+    ).toBeTruthy();
+    mockAddress1.position = 10;
+    mockAddress2.position = 0;
+    mockAddress3.position = 3;
+    expect(
+      hasProperPositionIndexes([mockAddress1, mockAddress2, mockAddress3]),
+    ).toBeTruthy();
+  });
+});