Legal Question in Wills and Trusts in New York

If he and his partner were married, you would only get notice of the will being admitted to probate if you were a legatee (ie, if your name is mentioned in the will as a beneficiary, executor, etc.) as the partner is next of kin if they were married. If they were not married, and he had no other spouse or kids, your sister would get noticed. The easiest thing to do is to file an administration petition to become appointed as the administrator. If they were married, he would get served and if he had a will he would file then. If they were not married, your sister would become the administrator and govern the estate. If you want to find out if a will has gone to probate, call the court. The real missing fact that you did not post is whether they were married.