No need. According to information from Baidu Lulin, when applying for a car loan, if a couple applies for a car loan together, both husband and wife need to be present to sign, and submit their ID cards, bank statements and other income certificates, as well as their marriage Proof of relationship (marriage certificate) and other documents, if only one party is applying for a car loan, there is no need for both husband and wife to sign, only the signature of the borrower himself.