Texas  |  Wills and Trusts

When you say the only heirs are nieces and nephews, I assume he was not married at time of death and or he left no will. If he was not married then you look at whether his parents are alive and if deceased then brothers and sisters are next in line but if deceased then nieces and nephews are next in line, of course assuming he had no children. You can do an administration ie die without a will or you can have a lawyer prepare an Affidavit of Heirship which is less expensive and it transfers interest in the property to the living heirs.

Affidavits of heirship should be sufficient.