# Using Service-Linked Roles for User Notifications
AWS User Notifications uses AWS Identity and Access Management (IAM) [service-linked roles](https://docs.aws.amazon.com/IAM/latest/UserGuide/id_roles_terms-and-concepts.html#iam-term-service-linked-role). A service-linked role is a unique type of IAM role that is linked directly to User Notifications. Service-linked roles are predefined by User Notifications and include all the permissions that the service requires to call other AWS services on your behalf.
A service-linked role streamlines setting up User Notifications because you don’t have to manually add the necessary permissions. User Notifications defines the permissions of its service-linked roles. Unless defined otherwise, only User Notifications can assume its roles. The defined permissions include the trust policy and the permissions policy. That permissions policy can't be attached to any other IAM entity.
For information about other services that support service-linked roles, see [AWS Services That Work with IAM](https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_aws-services-that-work-with-iam.html) and look for the services that have **Yes** in the **Service-Linked Role** column. Choose a **Yes** with a link to view the service-linked role documentation for that service.
**Topics**
+ [AWS User Notifications service-Linked Role for calling AWS services, publishing metrics, and using AWS Organizations](slr-call-services.md)
+ [Supported Regions for User Notifications Service-Linked Roles](#slr-regions)
+ [Amazon EventBridge managed rules in AWS User Notifications](ev-managed-rules.md)
## Supported Regions for User Notifications Service-Linked Roles
User Notifications supports using service-linked roles in all of the Regions where the service is available. For more information, see [AWS Regions and Endpoints](https://docs.aws.amazon.com/general/latest/gr/rande.html).