12 C.F.R. § 328.106
(a) If the FDIC has reason to believe that any person may be misusing an FDIC-Associated Image or FDIC-Associated Term or otherwise violating § 328.102(a), or may be making false or misleading representations regarding deposit insurance in violation of § 328.102(b), the FDIC may issue an advisory letter to such a person and/or any person who aids or abets another in such conduct, including any Third-Party Publisher. Generally, such an advisory letter will:
(2) Request that the person and/or Third-Party Publisher:
(e) Nothing in this section will prevent the FDIC from commencing a formal enforcement action under § 328.107 at any time before or after the issuance of an advisory letter under this section if: