Mississippi Code Title 45. Public Safety and Good Order § 45-9-207

(1) Except for those records kept during the regular course of a criminal investigation and prosecution or as otherwise required by law, a state governmental agency or local government, special district, or other political subdivision or official, agent, or employee of the state or other governmental entity or any other person, public or private, other than the owner or owner's representative, may not knowingly and willfully keep or cause to be kept any list, record, or registry of privately owned firearms or any list, record, or registry of the owners of those firearms.

(2) A financial institution or its agent may not require the usage of the firearms code in a way that distinguishes a firearms retailer physically located in the State of Mississippi from general merchandise retailers or sporting goods retailers.

(3) A financial institution may not discriminate against a firearms retailer by declining a lawful payment card transaction based solely on the assignment or nonassignment of a firearms code; provided that a financial entity may decline or otherwise refuse to process the transaction on the basis of the firearms code only if necessary to comply with this section or if requested by the customer or due to fraud controls or merchant category exclusions offered by a financial entity for the purpose of expenditure control or corporate card control.

(4) Except as otherwise required by law or regulation, a financial institution may not disclose a financial record, including a firearms code that was collected in violation of Sections 45-9-201 through 45-9-209, unless the disclosure of such financial record or firearms code was based on a good-faith conclusion that the entity's action was required by applicable law or regulation.

(5) Nothing in this section shall limit the ability of a financial institution to negotiate with responsible parties or otherwise impair the financial institution's actions related to dispute processing, fraud management, protecting transaction integrity from concerns related to illegal activities, breach or cyber risks.