# Exceptions¶

There is a standard set of exceptions that Sanic JWT uses to communicate. Here is a subset of exceptions that you may find helpful while creating your application.

• AuthenticationFailed
• MissingAuthorizationHeader
• MissingAuthorizationCookie
• InvalidAuthorizationHeader
• MissingRegisteredClaim
• Unauthorized

It is recommended that you use exceptions in your Sanic JWT implementation. If an exception occurs, then you can control what message to return to the client. See Endpoints and Responses for more information.