CASS (Coding Accuracy Support System)

CASS, or Coding Accuracy Support System, is a program used by the US Postal Service to verify the accuracy of address data in mail routing and processing. It compares address information against official postal records to ensure correctness, completeness, and proper formatting. By doing so, CASS helps reduce delivery errors, speeds up mail sorting, and improves overall efficiency. It is an essential tool for businesses and postal operations to maintain high-quality address databases, ensuring that mail reaches the intended recipients accurately and promptly.