diff --git a/packages/auth/src/Domain/SharedSubscription/SharedSubscriptionInvitationRepositoryInterface.ts b/packages/auth/src/Domain/SharedSubscription/SharedSubscriptionInvitationRepositoryInterface.ts
index fd02fa644..10be95f12 100644
--- a/packages/auth/src/Domain/SharedSubscription/SharedSubscriptionInvitationRepositoryInterface.ts
+++ b/packages/auth/src/Domain/SharedSubscription/SharedSubscriptionInvitationRepositoryInterface.ts
@@ -7,5 +7,9 @@ export interface SharedSubscriptionInvitationRepositoryInterface {
   findOneByUuidAndStatus(uuid: Uuid, status: InvitationStatus): Promise<SharedSubscriptionInvitation | null>
   findOneByUuid(uuid: Uuid): Promise<SharedSubscriptionInvitation | null>
   findByInviterEmail(inviterEmail: string): Promise<SharedSubscriptionInvitation[]>
+  findOneByInviteeAndInviterEmail(
+    inviteeEmail: string,
+    inviterEmail: string,
+  ): Promise<SharedSubscriptionInvitation | null>
   countByInviterEmailAndStatus(inviterEmail: Uuid, statuses: InvitationStatus[]): Promise<number>
 }
diff --git a/packages/auth/src/Domain/UseCase/InviteToSharedSubscription/InviteToSharedSubscription.spec.ts b/packages/auth/src/Domain/UseCase/InviteToSharedSubscription/InviteToSharedSubscription.spec.ts
index f26d5644b..cfa25f6d2 100644
--- a/packages/auth/src/Domain/UseCase/InviteToSharedSubscription/InviteToSharedSubscription.spec.ts
+++ b/packages/auth/src/Domain/UseCase/InviteToSharedSubscription/InviteToSharedSubscription.spec.ts
@@ -10,6 +10,7 @@ import { UserSubscriptionRepositoryInterface } from '../../Subscription/UserSubs
 import { UserSubscription } from '../../Subscription/UserSubscription'
 import { RoleName } from '@standardnotes/common'
 import { UserSubscriptionType } from '../../Subscription/UserSubscriptionType'
+import { SharedSubscriptionInvitation } from '../../SharedSubscription/SharedSubscriptionInvitation'
 
 describe('InviteToSharedSubscription', () => {
   let userSubscriptionRepository: UserSubscriptionRepositoryInterface
@@ -40,6 +41,7 @@ describe('InviteToSharedSubscription', () => {
     sharedSubscriptionInvitationRepository = {} as jest.Mocked<SharedSubscriptionInvitationRepositoryInterface>
     sharedSubscriptionInvitationRepository.save = jest.fn().mockImplementation((same) => ({ ...same, uuid: '1-2-3' }))
     sharedSubscriptionInvitationRepository.countByInviterEmailAndStatus = jest.fn().mockReturnValue(2)
+    sharedSubscriptionInvitationRepository.findOneByInviteeAndInviterEmail = jest.fn().mockReturnValue(null)
 
     domainEventPublisher = {} as jest.Mocked<DomainEventPublisherInterface>
     domainEventPublisher.publish = jest.fn()
@@ -181,4 +183,26 @@ describe('InviteToSharedSubscription', () => {
 
     expect(domainEventPublisher.publish).not.toHaveBeenCalled()
   })
+
+  it('should not create an invitation if it already exists', async () => {
+    sharedSubscriptionInvitationRepository.findOneByInviteeAndInviterEmail = jest
+      .fn()
+      .mockReturnValue({} as jest.Mocked<SharedSubscriptionInvitation>)
+
+    expect(
+      await createUseCase().execute({
+        inviteeIdentifier: 'invitee@test.te',
+        inviterUuid: '1-2-3',
+        inviterEmail: 'inviter@test.te',
+        inviterRoles: [RoleName.ProUser],
+      }),
+    ).toEqual({
+      success: false,
+    })
+
+    expect(sharedSubscriptionInvitationRepository.save).not.toHaveBeenCalled()
+
+    expect(domainEventFactory.createSharedSubscriptionInvitationCreatedEvent).not.toHaveBeenCalled()
+    expect(domainEventPublisher.publish).not.toHaveBeenCalled()
+  })
 })
diff --git a/packages/auth/src/Domain/UseCase/InviteToSharedSubscription/InviteToSharedSubscription.ts b/packages/auth/src/Domain/UseCase/InviteToSharedSubscription/InviteToSharedSubscription.ts
index c9f15c4db..21e336ad1 100644
--- a/packages/auth/src/Domain/UseCase/InviteToSharedSubscription/InviteToSharedSubscription.ts
+++ b/packages/auth/src/Domain/UseCase/InviteToSharedSubscription/InviteToSharedSubscription.ts
@@ -53,6 +53,16 @@ export class InviteToSharedSubscription implements UseCaseInterface {
       }
     }
 
+    const existingInvitation = await this.sharedSubscriptionInvitationRepository.findOneByInviteeAndInviterEmail(
+      dto.inviteeIdentifier,
+      dto.inviterEmail,
+    )
+    if (existingInvitation !== null) {
+      return {
+        success: false,
+      }
+    }
+
     const sharedSubscriptionInvition = new SharedSubscriptionInvitation()
     sharedSubscriptionInvition.inviterIdentifier = dto.inviterEmail
     sharedSubscriptionInvition.inviterIdentifierType = InviterIdentifierType.Email
diff --git a/packages/auth/src/Infra/MySQL/MySQLSharedSubscriptionInvitationRepository.spec.ts b/packages/auth/src/Infra/MySQL/MySQLSharedSubscriptionInvitationRepository.spec.ts
index 647ea41a2..b450f8714 100644
--- a/packages/auth/src/Infra/MySQL/MySQLSharedSubscriptionInvitationRepository.spec.ts
+++ b/packages/auth/src/Infra/MySQL/MySQLSharedSubscriptionInvitationRepository.spec.ts
@@ -70,6 +70,23 @@ describe('MySQLSharedSubscriptionInvitationRepository', () => {
     expect(result).toEqual(invitation)
   })
 
+  it('should find one invitation by invitee and inviter email', async () => {
+    queryBuilder.where = jest.fn().mockReturnThis()
+    queryBuilder.getOne = jest.fn().mockReturnValue(invitation)
+
+    const result = await createRepository().findOneByInviteeAndInviterEmail('invitee@test.te', 'inviter@test.te')
+
+    expect(queryBuilder.where).toHaveBeenCalledWith(
+      'invitation.inviter_identifier = :inviterEmail AND invitation.invitee_identifier = :inviteeEmail',
+      {
+        inviterEmail: 'inviter@test.te',
+        inviteeEmail: 'invitee@test.te',
+      },
+    )
+
+    expect(result).toEqual(invitation)
+  })
+
   it('should find one invitation by uuid', async () => {
     queryBuilder.where = jest.fn().mockReturnThis()
     queryBuilder.getOne = jest.fn().mockReturnValue(invitation)
diff --git a/packages/auth/src/Infra/MySQL/MySQLSharedSubscriptionInvitationRepository.ts b/packages/auth/src/Infra/MySQL/MySQLSharedSubscriptionInvitationRepository.ts
index 9807d2395..8cfd094af 100644
--- a/packages/auth/src/Infra/MySQL/MySQLSharedSubscriptionInvitationRepository.ts
+++ b/packages/auth/src/Infra/MySQL/MySQLSharedSubscriptionInvitationRepository.ts
@@ -13,6 +13,19 @@ export class MySQLSharedSubscriptionInvitationRepository implements SharedSubscr
     private ormRepository: Repository<SharedSubscriptionInvitation>,
   ) {}
 
+  async findOneByInviteeAndInviterEmail(
+    inviteeEmail: string,
+    inviterEmail: string,
+  ): Promise<SharedSubscriptionInvitation | null> {
+    return this.ormRepository
+      .createQueryBuilder('invitation')
+      .where('invitation.inviter_identifier = :inviterEmail AND invitation.invitee_identifier = :inviteeEmail', {
+        inviterEmail,
+        inviteeEmail,
+      })
+      .getOne()
+  }
+
   async save(sharedSubscriptionInvitation: SharedSubscriptionInvitation): Promise<SharedSubscriptionInvitation> {
     return this.ormRepository.save(sharedSubscriptionInvitation)
   }