Cannot create the domain because it is a top-level domain or other public suffix.

Question

When I add a domain, I receive the following, what can I do?

The system cannot create the domain "domain.tld" because it is a top-level domain or other public suffix. You must use a different domain name.

Answer

Registrars that control top-level domains (TLDs) maintain a public list of the kinds of domain names that are allowed to be registered. cPanel subscribes to this list and prevents domains that do not comply from being added.

It is possible for the registrar in control of the domain to submit an amendment to the list. This is done through the publicsuffix.org page:

SUBMIT AMENDMENTS