Given the situation, I think that is a prudent decision (marking "I did not analyze..."). Again (and something you would probably do without the unsolicited advice) when I'm in a situation where I am going to check a box on the form that I know will create review-scrutiny, I
A. Describe the situation
B. State what my reporting options are based on the requirements of the UAD or GSE form protocol
C. State what option I took (I checked "did not analyze")
D. State why I selected the option I did.
If I were faced with your situation, I'd handle that conversation something like this:
I have been provided with a copy of the purchase contract; however, part of that copy is illegible. Specifically, I cannot read Item #6 which discusses other terms.
I have requested a legible copy from my client, Lender X. I have not received a legible copy.
The legible parts of the contract confirm the contract date and the sale price and I have reported them in my appraisal. There were no other significant items noted in the legible part of the contract I was provided.
Since I cannot read what is written in Item #6, I cannot complete the comprehensive analysis that is required by the USPAP. Therefore, I have indicated "did not analyze..." on the form and am explaining the situation herein.
The USPAP requires me to state why the purchase contract was not analyzed and requires me to outline the steps I have taken to analyze the contract. This summary meets that requirement.
There. Now anyone reading my report knows why the box is checked, what caused that box to be checked, and what I did to try to avoid checking that box. The ball is in the lender's court now.
BTW, I wouldn't be surprised if the lender gets a legible copy and provides it to you. If that happens, I'd be prepared to amend the report and include the contract analysis.
Good luck!