ICCAN require a verification email for all domains registered, if not verified after 15 days, the domain is locked until the verification is done.

logicboxes has the option to resend the verification email via API, it could be very usefull to add it to the module.

also if the domain isn't verified and locked for verification is suggested to disable all clients action as they will return error. is better to show waring/danger altert to tell client the verification by email should be done to release the domain again.

API docs
https://manage.resellerclub.com/kb/answer/2010