An address check refers to the process of verifying the accuracy and validity of a physical or mailing address. This is commonly done in various industries, such as finance, e-commerce, logistics, and government, to ensure that the address provided by an individual or a business is correct, up-to-date, and can receive mail or deliveries. Address checks can involve cross-referencing the given address with official postal records, databases, or through specialized software that automatically verifies and standardizes addresses.