Unable to Locate "Trash"

There is not even our version to select here it is so old. I am working off version 2.2.8. We have run into an issue multiple times where if someone creates an account with an e-mail address, then makes a mistake and wants to start over, they are unable to use the same e-mail address again. If I "delete" their record and try to create an account it gives an error message stating that the e-mail is already in use. I believe that this is because if I "delete" something, it is not really being permanently deleted and in order to permanently delete these items there must be a function SOME WHERE in our version. I just have yet to find it. Any suggestions?