7 Del. Admin. Code § 3300-3311
All persons ages 16 and older who wish to fish in Delaware's fresh or tidal waters or both in any given year must first obtain a Fisherman Identification Network (F.I.N.) number for the year in question before fishing. This number may be obtained at no cost to the angler by calling a toll free number and providing the required information over the phone or by entering the required information on-line through an internet access portal designated by the Department for that purpose. Each person who requests a F.I.N. number is to write this number on his or her Delaware fishing license, or those who are legally unlicensed must be able to produce this number when checked by an enforcement agent when fishing in Delaware waters. Failure to provide a valid F.I.N. number for the year in question is a violation of 7 Del.C. § 501 in the case of residents, or 7 Del.C. § 506 in the case of non-residents, and will be treated the same as a failure to have a fishing license before going fishing. Information provided during the process of obtaining a F.I.N. number shall be treated as confidential and may only be shared with the National Marine Fisheries Service for the purpose of compliance with federal requirements for a national registry of marine fishermen.
7 Del. Admin. Code § 3300-3311
16 DE Reg. 788 (01/01/13)