I wouldn't specifically ask for money. If me and my DP had everything we needed and didn't want any gifts, I would specifically say please no gifts and somehow try to get across to guests that we do not have any room/need for them! Of course people would still probably give gifts - things we don't need or already have, but isn't that the nature of gift giving? I know that my family rather give cash than gifts anyway, as they are lazy or can't think of what to buy lol. I am a big charity person so I think the Oxfam idea or having a wishing well set up for a charity is a great idea! I think I'll p*ss off a lot of people at my wedding - I've already told DP the catering will be strictly vegetarian!

On the other hand, it is really understandable why asking for money is common these days. Considering many couples tie the knot after living with each other for a while, traditional gifts aimed to set them up for married life are kinda irrelevant iykwim. Therefore money is more practical, and it also ensures that it will actually be used for something the couple need or want. Isn't that the whole point to begin with??