When the person who died (the Decedent) had a Will then the Will must be filed in Surrogate's Court and admitted (approved) for probate. Administration When a Person Dies with No Will.Do you know how to find out if you are a beneficiary on a bank account? Get the resources you need to help navigate someone else's financial affairs. 2.3K votes, 370 comments. My dad passed away two months ago. Upon completion and registration of a death certificate, the next of kin will need copies of the official death certificate as proof of death. The decedent, participates in a marriage ceremony with a third person; or. 3. IF you are decedent's spouse or next-of-kin. As soon as practical following the person's death.