Hi, this is a copy of the email one of my users got:
Our last attempt to charge the membership payment for your account failed.
You are requested to log in to your account at tipmytip travel experts to provide a different payment method, or contact your bank/credit-card company to resolve this issue.
Failure to do so will result in your account being removed from tipmytip travel experts.
This template is similar to the membership template in the pieregister. Only the few that got the email got their accounts removed. I did find out that these users has failed logins, but I assume they reset their password (could this the reason that they were judged as invalid users and got their account removed) but haven’t checked with them yet.