If the vehicle is within 3 months of import, auction sheet is verifiable, otherwise it isn't. Though there is a thread on Pakwheels where you provide details of the vehicle and if lucky, you get the verification and proper auction sheet.
Its just there for you too see, if no auction sheet makes no difference.
All auction sheets have printed and hand written places, they always jot down the data using a pen but the auction sheet you receive will be in black, like a photocopy.
They require import documents, custom clearance documents, no one requires the auction sheet, that is just for your knowledge.
Again, try your luck on that thread. If not, post it here and see if someone can recognize it, usually experienced personal can tell a fake from a real one.
Post pictures of the vehicle and the sheet, All that actually matters is the condition of the vehicle, the auction sheet makes no difference to it