The UCC is short for Uniform Commercial Code.  This a code that contains principals of law regarding the sale of goods, securitization, sales, and negotiable instruments.  With resepct to property, a UCC reference means that there is a lien on the property.  In other words, a bank has a security interest in the property whereby they get to take it if you do not pay the mortgage.  If there is a UCC, it means that someone has an interest other than the owner on the deed.  I would need to see the deed to give you a better answer, but the UCC refers to an entity that has an interest in the property that may take it if the owner fails to pay.