Send a formal invitation in the mail to get guests excited about the baby shower and set the tone for the event.
List both a phone number and email address for an RSVP.
Let everyone know where the mother is registered for gifts by inserting a card or line on the invitation.
If money or a donation is preferred, do not list a gift registry location. When people contact you to RSVP and inquire about a gift simply say, "A donation towards their nursery would be great."