Wendoline, I can only assume that your loan officer is new, and does not have much of an idea what they are doing! The 3 prior responses are textbook classics from a guess of close to a century of banking. Unless there is state law to the contrary, IMHO, the bank could make the loan, as stated, or turn it down and wait for the regulator to show up.
ECOA
1002.7(d)(4) (4) Secured credit. If an applicant requests secured credit, a creditor may require the signature of the applicant's spouse or other person on any instrument necessary, or reasonably believed by the creditor to be necessary, under applicable state law to make the property being offered as security available to satisfy the debt in the event of default, for example, an instrument to create a valid lien, pass clear title, waive inchoate rights, or assign earnings.
Commentary:
Paragraph 7(d)(4).
1. Creation of enforceable lien. Some state laws require that both spouses join in executing any instrument by which real property is encumbered. If an applicant offers such property as security for credit, a creditor may require the applicant's spouse to sign the instruments necessary to create a valid security interest in the property. The creditor may not require the spouse to sign the note evidencing the credit obligation if signing only the mortgage or other security agreement is sufficient to make the property available to satisfy the debt in the event of default. However, if under state law both spouses must sign the note to create an enforceable lien, the creditor may require the signatures.
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Integrity. With it, nothing else matters. Without it, nothing else matters.