The Agency Verification Code (AVC) is used to validate that the correct ORI/OAC is being used during the registration process.  The AVC is chosen by the Agency during the Agency Enrollment process.  The format you must use when determining your AVC is up to a twenty character/number combination.  Agencies may use their AVC indefinitely or they may change it whenever they want using their AGENCY ID and PASSWORD provided during Agency Enrollment. under the "Account" menu option.