Hi! Firstly I’d just like to say you don’t have to pay for your letters! At all! It’s not like that – but because I am writing so many (so far I’ve written over 4,000 and sent them all over the world!) If, like at Christmas or something you want to donate some money in the Stamp Fund that would be really lovely! Although it is the ‘Stamp Fund’ this helps with stamps, stationary, office space, volunteer costs and so much more! Obviously, you don’t have to. It’s one of them things if you find a spare pound and you’re like, “what could I do that would be nice with this pound?!” – chuck it in the stamp pot! Or, buy yourself some Orangina because that’s really nice too.