Having receipts is the difference between "oh I guess I didn't request that 6 months ago. but I want it now, so how much will the change order cost?" and "you'r

Having receipts is the difference between "oh I guess I didn't request that 6 months ago. but I want it now, so how much will the change order cost?" and "you're lying and trying to rip me off, you'll be hearing from my lawyers next".