As the power ends at the time of death, an agent operating under a power of attorney does not, however, have the authority to enter a deceased’s box. As such, in planning one’s estate, it is critical to include important passwords with one’s estate planning instruments. In pursuing veterans benefits and Social Security benefits, each of those offices should be contacted. In contacting the VA, you should call the nearest VA Benefits Information and Assistance office. For VA benefits claims, you will need much of the same plus his or her VA number and dates of active service.