Use a honeymoon registry. I've lived with my FI for almost 13 years so of course, our household is well established and we don't need another toaster or Cuisinart. I used www.honeyfund.com and connected it with my paypal account. Basically, you can set it up any way you want with different prices such as $50 towards airfare for two to Paris or $25 for spa services. Your guest would just pick one and pay for it via paypal, credit card or even print out the coupon and give you cash or check. The money goes straight to your paypal account. There's a small fee but this way your guests can use their credit card if they want to instead of just giving you cash.