LONDON — Royal Mail of Britain is used to apologizing to customers, mostly for missing parcels and letters sent to the wrong address.

But an error in a design for a stamp to commemorate the 75th anniversary of D-Day — it showed American troops on the wrong beach, in Asia instead of Europe — has spurred an apology to veterans and their families.

Royal Mail announced the special series of stamps “showcasing the ‘Best of British’ ” on Thursday. One design trumpeted on Twitter showed troops knee-deep in water as they disembarked from a landing craft. The caption said, “D-Day: Allied soldiers and medics wade ashore.”

But the beach shown was in Dutch New Guinea, today a part of Indonesia, not in Normandy, France. And the stamp used an image of the wrong craft.