Louisiana Mailing Matrix Verification or Declaration is a document used to verify the mailing address of an individual or business in the state of Louisiana. This document is commonly used by organizations and businesses to ensure that they are properly addressing and sending mail to the correct address. It can also be used to verify the accuracy of an address before any type of mailing. There are three types of Louisiana Mailing Matrix Verification or Declaration: Address Verification, Address Declaration, and Address Re-Verification. Address Verification is used to verify that an address is correct and up to date. Address Declaration is used to declare an address and is commonly used when applying for a loan or credit card. Address Re-Verification is used to verify an address upon request.