You should be given an email address in the error message. Send an email there and you will be given further instructions.
If you are banned
Your ban message may have an email address which you can email. If not, then appeals are unlikely to be accepted.
If your account was hacked
Email [email protected], ideally from the account's email address. Include your username and a brief description of the details of how/when the account was hacked. A signature will likely be required (see below).
If you forgot the password or similar
Try using the email password reset. Check that the email isn't ending up in your spam folder. If that doesn't work, email [email protected], ideally from the account's email address. Include your username. A signature will likely be required (see below).
Signatures
Often, you need to prove ownership of the account with a PGP or Bitcoin signature. This has two steps:
1. You need to show that the PGP key or Bitcoin address is associated with the account, for example by referencing an unedited post in which you posted the address.
2. You need to sign an appropriate message with that key/address.
For example, this is an example of an appropriate proof of ownership:
Quote
-----BEGIN BITCOIN SIGNED MESSAGE-----
My account has been hacked/lost. Please reset the email to . The current date is .
-----BEGIN SIGNATURE-----
-----END BITCOIN SIGNED MESSAGE-----
Here is the unedited post where I posted that address: ...
My account
-----BEGIN SIGNATURE-----
-----END BITCOIN SIGNED MESSAGE-----
Here is the unedited post where I posted that address: ...
Note the following elements:
- The message contains the username, the desired new email, and the current date.
- You specify the address.
- You include a signature.
- You link to the association between the address used for signing and the account.