I'm a week and a half out from the big day and I am tying up all the loose ends. I am planning on tipping certain vendors with either cash or gifts BUT I have been using a custom stationary company and they have custom made all of our save the dates, invites, seating charts, etc. We met with her once and all other communication has been through email. Our contract does not include any service charges or gratuity. Do I send her a monetary tip?