Tax liens -Finding heirs when property owner deceased

[Karen D. Schiano]

I am about to foreclose on an Arizona tax lien where I know the owner is deceased.  I've found a few relatives.  I saw an obituary I didn't print and now can't find again, but I know the owner died.  He didn't have services by his request so I am guessing he might have been a hermit or estranged from family.   How can I find if he had a will and then would it not suffice to just contact the executor and serve them the papers?  Or do I need to contact each relative and serve papers on each of them?  That could get costly.  I am doing it all myself, they are low dollar lands in Navajo county.  If I can find the funeral home I'm guessing they could tell me who made arrangements.  Any recommendations how to proceed?  Thanks.