When a borrower defaults on mortgage payments, banks typically aim to recover dues from the borrower's pledged property first. While a guarantor's property can be used, it's generally considered after exhausting the borrower's assets. The bank has discretion, but proposals to auction the guarantor's property before the borrower's, especially if the borrower's property is more valuable, may be seen as unfair. Legal consultation is advised, particularly regarding specific proceedings like those under the SAFAESI Act.