Doing a BRRRR! Should I keep receipts of materials?

[Shonari Wynter]

Hey everyone!

So doing my first BRRRR. Project is about a month out from completion so I've been thinking about the refinance part of it.

The contractor has been giving me final receipts. Meaning they buy the materials and provide the labor and then make a receipt showing the total. Just wandering if I need to provide copies of receipt for the actual materials (example pitching cabinet purchase)  or is the builders receipt enough when doing a LTC refinance?