NO !!! What they are doing is trying to claim you as a part time employee of theirs and deduct that $7,000 dollars from their gross income. They feel they can do this because it was cash and there is no way to trace the purchase. Threaten to report them to the IRS and REFUSE to sign ANYTHING because this will make it appear as INCOME for YOU (because you social security number has to be on that form) and you'll have to pay income tax on that $7,000 to the tune of 25%!!!! The IRS may not see it right away but come August they'll send you a bill for the tax on that money he wants you to claim. What he is doing is against the law.