Why it matters
You rarely see EPP, but you feel it. Status codes like clientTransferProhibited and the auth code used in transfers are EPP features. When a domain will not transfer, the cause is often an EPP status on the record. Reading those statuses in a WHOIS or RDAP lookup tells you what is blocking the move. A common mistake is guessing at a transfer problem without checking the statuses first. Your registrar can show you the status codes in plain language.
Source: rfc-editor.org
Read nextHow Domain Transfers Work: Auth Codes, Transfer Locks, and Push vs Transfer