Honeymoon registry question?

we booked our honeymoon with liberty travel. they gave us small enclosure regsitry cards that basically says that the couple is registered with liberty travel and our registry number. then people can go to any liberty travel and put money into our account, rather than writing us a check. liberty will in turn give them an enclsure card that they can put in a card to us for the wedding, shower, whatever that says so and so is helping to send us on our honeymoon.
we are also making payments on our honeymoon... so if we end up getting more money in the account than we need, liberty will give it back to us in cash.