How to Wholesale a house that isn't owned by current owners

[Fellnix F Sanchez]

I have a house under contract that has an after repair value (ARV) of $44,000 and I got it under contract for $25,000. The house however, is owned by a relative of the wife who happens to live in another state. Will he need to be present in order to sign the Purchase and Sale agreement since he is technically the seller? Would he also have to be present during the closing date?