If the deed is in the husband and wife's name, and they have both passed then the property will most likely need to be probated. At that time the heirs are named based on the probate. Then they have the legal right to sign.
You will need to consult with an attorney who handles wills/probates/estates.
Title Junction, LLC
You could do a lease with the option to purchase the condo and take 10% down with a monthly paymnt equal or greater to what a mtg payment would be and then you have tenants with the pride of ownership and you get a higher return on your investment. And in the worse case senario and they default you keek full deposit and monthy portion going toward closing in your pocket and do it again. I did this stratagy on my primary residents and it went through with the 2nd family. If you are interested in my help please do not hesitate to contact me at.