TinyPrints is holding an offer today where you can get a custom Father's Day card for only $0.99. If you have it sent elsewhere, it'll cost an extra $0.44, so hopefully you live near your dad. All you have to do is use code GC99 at checkout.
They held the same deal for Mother's Day, but I was traveling and didn't get a chance to post it. However my sister made one for our mom and it was awesome, especially the part where she made it seem like it came from me and then purposefully misspelled everything and made it look like I was an idiot. Ahhh, the Goob family.
Next is an offer from CardStore. This deal is for a free card, shipping included. The coupon code for this is FREECARD and again, enter it at the checkout screen. Make sure you hit “apply” instead of hitting “next.” That way you'll be able to skip the credit card section.
If anybody comes across any additional codes for Father's Day cards, then please share them in the comments!