Handwritten receipts especially if fully written out by the other side and signed by him or her are even better than a typed out receipt that is only signed by the person who sold the vehicle that you are writing about. The best type of recept is if the signature on the document is actually notarized by a notary public.The issue that I see regarding your matter is that the seller of the vehicle that you bought may claim that the receipt that you have does not bear his or her signature upon it. Be prepared to get other documents that the seller signed to show that the receipt is actually signed by the seller for any court appearance that you may have.