When I apply to a club, how am I notified if accepted or not?

If you are accepted, you will receive a letter in your game mailbox. If your application was declined, you will not receive any notification. Your only indication is if you search and find the club details again. If your application was not reviewed and is still pending, you will find a red button that allows you to "revoke" your application. If your application was declined, then instead, you will find a green button that allows you to "apply" again.

Know that presidents and officers will not receive any notification if there is an application pending for them to review. Only if they look at their club details, will they see a number on their mailbox icon. If possible, it's better to contact presidents/officers outside of the game if you intend to "apply" so they are aware of an incoming application.