I recently did a deal where the seller started out being very cooperative, but a couple of hiccups later and they were avoiding letting the buyer in and dragging their feet on providing information.

I work with Dave Cooper there. 

The new place I was supposed to move in failed to cooperate in all regards and laid all laws and conditions in their favor.I requested to see a copy of lease to check if there were any terms I might not like, but they refused and said that will be available the day I sign the lease that is one day before I wanted to move in.

On the other hand, if you believe that the tenant is doing the second thing (using someone else's identity to fraudulently obtain service), and the utility company won't cooperate, then there's probably not a lot you can do in that situation unless you can prove it and/or the Housing Authority has a rule about having service in the tenant's own name and they can compel the tenant to prove that they do.Lastly, it sounds like this is a problem tenant so you should start looking into your state's requirements to end the tenancy when the lease is up, and issue the proper notice of non-renewal as soon as appropriate so that she's out when the term of the lease ends.

Thank you for your cooperation as courteous and clean neighbors!

@Robert Cooper I'm not sure about specific banks but hard money and specialty lenders do.

It also puts any Sand Bagging listing agent on verified notice and/or "Forces"  them to cooperate in showing their own listing should you need them too and better ensures your offer actually reaches the seller...who's already loving you in advance and asking about you!

Then we find out I can't afford the rehab, or a tenant doesn't want to cooperate for a showing, etc.  

It is available only for properties being held for investment.They would qualify for the sec 121 primary residence exclusion once they have lived in the property long enough that they can claim residency for 2 out of the 5 years immediately prior to sale.You could certainly enter into an option and cooperation agreement with them that would allow you to pursue the entitlements/permitting you might need. 

Without cooperation from the neighbor, this will not likely be a quick/easy task.