The ZIP Code is not an element conveyed from seller to buyer in a real estate transaction. Prospective buyers of real estate do not establish a relationship with the local Post Office before purchase. According to USPS a 5-digit ZIP Code is not more than an internal USPS determination of through which Postal facility. A ZIP Code with an additional 4 numbers can represent which side of the street mail can be delivered or the numerical value of a PO BOX itself. USPS does not verify a physical address location. The ZIP Code is an element of mail addressing, not physical addressing

The USPS ZIP Code is not a GEO Code and USPS does not verify physical locations. Online registration forms often utilize auto-correct features to assign non-municipal labels to fields, effectively replacing municipal entities with locality names whose boundaries are imprecise or not formally recognized as part of a legal address tied to deed, plot, lot, tax map