Modification refers to making changes or updating information associated with a domain name record.

The database that the TLD registries maintain need to be accurate in order for name resolution, billing, renewal notices and public records to be processed correctly. Typically modifications are required when nameservers need to change or the contacts change email or postal address or phone number. The procedures for modifying records will depend on the registry. Owner, administrative and technical contacts usually have varying degrees of authority in the modification of domain name records.