20 C.F.R. § 10.414
If a beneficiary is receiving compensation benefits on account of an employee's death, OWCP will ask him or her to complete a report once each year on Form CA-12. The report requires the beneficiary to note changes in marital status and dependents. If the beneficiary fails to submit the form (or an equivalent written statement) within 30 days of the date of request, OWCP shall suspend compensation until the requested form or equivalent written statement is received. The suspension will include compensation payable for or on behalf of another person (for example, compensation payable to a widow on behalf of a child). When the form or statement is received, compensation will be reinstated at the appropriate rate retroactive to the date of suspension, provided the beneficiary is entitled to such compensation.
20 C.F.R. § 10.414