Q. We were advised at a retirement seminar to check that we have a copy of the designated beneficiary form for life insurance, the TSP, retirement and unused leave. I do not have a copy of the designated beneficiary form that I completed for retirement and unused leave. Since I plan to work three more years, it behooves me to request these forms. What is the title and/or number of the specific forms I need to complete? A:. Form TSP-3 is used to designate beneficiaries for your TSP account.