Will tuition paid by a relative be considered proof of payment on my behalf?

I received a CP2000 saying that the IRS requires proof of tuition paid. My husband received the Lifetime Learning Credit in 2015, and my understanding is that we must prove tuition was paid in order to receive that credit (since the amount listed as billed on his 1098-T is not considered the same as the amount paid).

The problem is that the tuition was paid by his parents. If I send the IRS a bank statement showing proof of payment, it will have someone else's name on it. They did not claim it on their taxes as I do not believe he can be considered a dependent. 

What are my options? Do I have to suck it up and pay the extra tax + interest? Can I submit proof of payment with someone else's name on it? Should I try to track down a payment receipt from the school itself? Please help!