DD's birthday was 5 weeks ago. After the event I wrote thank you cards for her various presents. Put pile by door to post (mainly to elderly friends of MiL who I've never even met but always send something).
Some time later I notice the cards have gone and "assume" DH has posted them (he goes past the post box on his way to work so usually takes any letters to post).
Today I have found them still at home. Something got put on top of them and then moved and hence they were never posted.
Is it completely ridiculous to post them now? Should I add a note on the back to the effect of "terribly sorry, got misplaced and weren't posted". Or do I just appear very rude and not send them at all?