pension credit, state pension and missing persons

can anyone tell me if there is anything a missing persons family needs to do when their relative goes missing, regarding state pension and pension credit?

The Police tend to contact the pension service as part of the investigation as they would normally check that benefits are still being paid to the missing person.
They would be best to put it in writing to the pension service that the person is missing, but from personal experience, the DWP don’t know what to do after that and probably will not reply to them, and you will find that they may even continue to pay as they don’t have a death certificate and unless the person is found, they can’t apply for a presumtion until 7 years have passed. I suppose technically they could suspend the benefits as they will not be able to review the pension credit as they don’t know where the claimant is, but that certainly has not been my experience.