CASS Certification (Coding Accuracy Support System) is a certification process by the USPS to evaluate the accuracy of address-matching software. Address Verification API is CASS Certified, ensuring that addresses are standardized, corrected, and verified according to USPS standards. This certification helps businesses improve the deliverability of their mail, reduce postage costs, and avoid undeliverable mail by ensuring that address data is accurate and up-to-date.
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