Data Plate refers to a paper document located on the interior of the property that contains specific information about the unit and its manufacturer. Manufactured homes have a data plate affixed in a permanent manner, typically adjacent to the electric service panel, the utility room or within a cabinet in the kitchen.
The appraiser must report the information on the data plate within the appraisal, including the manufacturer name, serial number, model and date of manufacture, as well as wind, roof load and thermal zone maps. If the data plate is missing or the appraiser is unable to locate it, the appraiser must report this in the appraisal and is not required to secure the data plate information from another source.
For more information see Handbook 4000.1 II.D.5.g. available at https://www.hud.gov/program_offices/administration/hudclips/handbooks/hsgh