My fiance has suggested that we include a registry notice with our invitations, stating that we are registered with a financial institution, giving the account number and routing information. We have both been married before and own homes. We are in our 50s, established and are not in need of any material gifts. Is it inappropriate in our situation to give our invitees this info (bank acct) in order to receive monetary gifts?
Yes, it IS considered impolite to include gift registry information in a wedding invitation since this implies that you are expecting a gift. Gift registry inclusion is only really acceptable with regard to a bridal shower where gifts are expected since the purpose of a shower is to supply the bride-to-be with gifts to set up a new household. Since you have stated that you are already setup and have no need for gifts then sit back and enjoy the wedding and don't worry about a registry.
If you still want to get he word out about your gift registry please either set up a personal wedding websitewhere you can include your registry informatio plus a bunch of other really useful information like directions and maps, RSVP, etc OR spread the word with family and friends about your gift preference so that, when asked, they can give that information. Top Wedding Questions Forum Moderator - "Write your sorrows in the sand, your blessings in stone".