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Address Validator (USPS address verification, international address validation): a free, easy-to-use tool from homepage to check any U.S., Canadian or international address (free for 100 addresses): + Verify U.S. and Canadian addresses (USPS/CASS certified) + Validate international addresses in 240+ countries worldwide + Address correction, standardization and re-formatting according to international standards + Address duplicate removal The Address Validator service cleans addresses in CRM systems, customer databases or Excel sheets from outdated or invalid addresses and helps our clients to save money and focus on real customers. Free Trial: You can upload a list with up to 100 postal addresses and we'll validate them for free!