Old Money

Last month I received this stamp on a postcard from John (the UK). He explained me that he stuck it just as a sticker, because it is "old money". Also in November Heleen (the Netherlands) sent me a lot of gulden stamps because it was the last time she could use them (what a pity!).

In Spain the euro replaced the peseta, in 2002, so we were obliged to change the stamps too. I remember stamps in pesetas were allowed for a short period after. Still now you can exchange them in post offices (you must go to a special post office if you have more than... 600 euros? Something like that).

I wonder if a lot of people have faced this problem...