Generally speaking, unless you add the word "administration," "social security" does not need to be capped.
...He is not old enough for social security.
...I will use my social security for that.
A reporter just presented this context, where I think it should be capped as it is talking about the entity.
...Did you speak with Social Security about that filing?
FYI: I will be at the ILCRA convention on September 12. Hope to see some of you there!
Happy punctuating!
Margie