It might seem obvious that they know where you are as they pay your pension. Similarly if you were looking for someone then PMA would forward a letter.
As pointed out however they seem to lose sight of you ~ probably at about the time you disappear on terminal leave.
Where do you wear your medals?
Get a set of minatures. Keep them in their red velvet purse in the pocket of your DJ. If your MD is wearing his then make your excuses and get properly dressed. If others are wearing medals and your MD is not then discretely leave them in your pocket so as not to embarass him.
On holiday, on some cruise ships, if there is a formal evening and the ships officers etc are wearing theirs them consider wearing your minatures with your DJ.
Full size medals? Remembrance Sunday at church and parade but remove before the pub lunch for possibly obvious reasons.