back ground check 3rd tenant who is 87yrs?

[Chris Maddox]

We have some potential tenant's who got an application from.
There is 3 of them, one is a mother in law and another her daughter in law.
The 3rd one is the mother in law father who is 87yrs.
We only gave applications to the 2 and was wondering should be check
the other one out who is 87yrs?
We are new and this is our first rental home to rent, Thanks