Fumiki Takahashi

Hametuha INC.

WordPress can allow your user to register by themselves, but has no function to delete their own account.
You can also create Resign Page which displays message to your customer.
<blockquote>
Are you sure to delete your account? We miss you.
</blockquote>

Never Let Me Go

If someone wants to leave your WordPress, let them go.

Saint Systems

Adam Anderly

This plugin gives you the ability to disable specific user accounts via a profile setting.
Once installed and activated, a checkbox appears on the user profile settings (only for admins). When checked, the user’s account will be disabled and they will be unable to login with the account. If they try to login, they are instantly logged out and redirected to the login page with a message that notifies them their account is disabled.
This can be useful in a few situations.
<ul>
<li>You want freelance writers to still show up in the authors box, but you don’t want them to be able to login.</li>
<li>You have former employees who have authored posts and you don’t want to delete them or reassign their posts to other users, but still need them to show up in the “Authors box.”</li>
<li>You are working on a site for a client who has an account, but do not want him to login and/or make changes during development.</li>
<li>You have a client who has an unpaid invoice.</li>
</ul>
<a href="https://github.com/saintsystems/disable-user-login/" rel="nofollow ugc">This plugin is on GitHub!</a> Pull requests are welcome. If possible please report issues through Github.

Disable User Login

Easy to use plugin that allows you to disable user accounts to prevent them from logging in.

Works as advertised

Provides the ability to disable user accounts and prevent them from logging in.

Never Let Me Go vs Disable User Login