Which of the following is a mandatory action for insurers regarding producer appointments?

Insurers have specific responsibilities when it comes to producer appointments, and one of the mandatory actions is to notify the commissioner of any termination of a producer's appointment. This requirement is in place to ensure that the regulatory authority is kept informed about the individuals who are licensed to sell insurance products on behalf of the insurer. The notification helps maintain oversight and ensures that all insurance activities remain compliant with state laws.

The other options listed do not fall under mandatory actions required of insurers. Notifying clients may be a good practice but is not mandated by law. Similarly, notifying the media or training programs is not a requirement that insurers need to fulfill in the context of producer appointments. Therefore, knowing that the insurer must inform the commissioner of termination is critical for maintaining the integrity and operational compliance of the insurance industry in Arkansas.