A CAA record, also known as a DNS CAA record, CAA DNS record, CAA record, CAA certificate, or DNS CAA, is a kind of Domain Name System public policy. It allows you, the domain owner, to let everyone know which certificate authorities are authorized to issue SSL/TLS certificates for your domain. Public certificate authorities can check this record to see if they qualify to issue a certificate for your domain. Check out additional explanations of DNS CAA records.