Denim monkey quesadilla

What is the etiquite for Wedding Invitations from work...? - what did you do with all of your wedding cards

Recently I received an invitation to the marriage of daughters of the VP. I do not know the work directly with Vice-President and I do not know his daughter. I know I want to attend. It would be bad taste to send money, or it would be better to send a greeting card or buy a gift and have returned to the reception? I do not know where he is registered, how do I not want someone who does not know what they might not need to know. We will do something, of course, but what is the best what to do under these circumstances?

On a personal note: If you know the person, then you really should not be to ask your wedding, yes, I know he was free for everyone to receive any gifts or money they can, but I still believe that makes another person (receiver) in an awkward position.