I googled, "mail social security card" and even though sometimes it is justified to do so, in this situation, I think the risk vastly outweighs the reward. Especially since the land surveyors would not even answer my questions about what the physical requirements were and stick shift, class a, b, or c , drive own car, and car insurance
They are too opaque
Besides they are so inflexible.
If the letter gets lost in the mail and someone gets my social security number, they could take my chump change, and do Buddha knows what else.