We do address the issue in our reports by checking the "subject to" box and having the following comment in the report: "This report is subject to an inspection by a licensed engineer for compliance with the Permanent Foundation Guidelines for Manufactured Housing."
We also should include any information that is within our area of expertise or based on observation as well as photos of any insignias, tags, seals, data plates, etc, etc, that we find.
We do not have the expertise to determine if the foundation and installation meets HUD's requirements, it would also be outside our expertise to determine if the support for the anchors or piers and any footings for the perimeter enclosure are below the frost line, etc. State, county and city requirements don't matter to FHA unless it is in conflict with local building or zoning codes. The home has to meet their criteria.
Yes, in Arizona, when a professional installer installs the home, state seals are affixed that check off what has been done and the date it was installed. Those quite frequently get removed or covered up. If present and readable it helps in determining if this site is the original location for the home or if it has been moved from another site. But it does not meet the requirements for HUD.