Prohibit user from deleting domains
Another customer's domain names were accidentally erased from his control panel, according to us. Please give us a choice to prevent this from occurring again. Alternatively, provide us access to a internal ticket system, which requires staff approval.
Thank you for your idea. When deleting a domain, a clear warning an confirmation dialog is displayed. Domains are only deleted when that additional dialog is confirmed. https://plesk.uservoice.com/forums/184549-feature-suggestions/suggestions/41416156-delete-domain
Nevertheless, we'll consider adding a feature that users won't be permitted to delete domains at all, if this request becomes popular.