Which of the following must a producer do promptly after a change of address?

When a producer changes their address, it is essential to notify the Commissioner of Insurance promptly. This requirement helps ensure that the state's regulatory authority has accurate and up-to-date information about licensed producers. Keeping the Commissioner informed is crucial for maintaining compliance with state regulations, which can facilitate communication regarding licensing, renewals, and potential audits.

Notifying the insurer is important, but the primary formal requirement under insurance regulations is to inform the Commissioner. This way, all relevant records are updated in the state database, which can help in maintaining transparency and proper oversight of licensed agents. Other options, such as notifying a client or submitting a supervised report, may not be legally required or necessary to maintain one’s license status in the same way.