This card was used as a notice for a Social Security beneficiary to contact the admistration regarding some official matter. The card was evidently sent in early 1975.
As can be seen on the back of the card, this is SSA form 2708 and was printed by the GPO in April of 1973. Although it is not cancelled, the sortation markings made by postal automation machinery on the back offer evidence of it having gone thru the normal mail stream.
Place mouse on image to see the reverse side of the card.