In the context of a real estate finance transaction, an attorney opinion letter (an AOL) is typically a legal opinion prepared by a licensed attorney that opines as to the authority of the borrower and the enforceability of the security instrument and the other loan documents. Customarily, an AOL does not opine as to the status of title, and the parties will rely on title insurance to confirm the priority of the lien of the mortgage. Unlike an AOL, title insurance is obtained to protect the owner and lender, as applicable, against any loss or damage resulting from defects in title. Nevertheless, some cities and counties in Florida require an AOL for matters that pertain to unity of title, permitting and zoning.