Add codes FIRSTGIFT for $20 off and TPSHIP for free shipping. Offer expires October 3, 2017 at 11:59 P.M. PT.
This will actually work on anything on the website, but I found it quite easy to get an order very close to $20 ($20.98 to be precise) by ordering 10 thank you cards (choose the ones that are “priced from $1.19”) or 72 address labels. You should be able to do the same with birth announcements, etc. as well.