FHA Automated Data Processing (ADP) Codes are derived from the section of the National Housing Act under which the mortgage is to be insured. The lender must select the correct ADP code for each mortgage in FHA Connection (FHAC).
The Mortgagee can access the ADP code listing in FHAC using:
For additional information see Handbook 4000.1 II.A.1.a.iii.(B)(1)(a) available at https://www.hud.gov/program_offices/administration/hudclips/handbooks/hsgh