DH and I just received a thank you note for a wedding gift (we were not able to attend the wedding since it was a week after our own). The thank you note was actually a small photo postcard with a wedding photo on the front. There is only room for them to write about 2 sentences on the back. I feel a little odd about this. Maybe I should just be happy to get a thank you note since not everyone does them anymore (even though they should) but it seems very informal and a little cheap. The funny thing is that their save the dates weren't even postcards, they were nice and in envelopes. Also, the postcard format for a thank you note allows anyone to read the note and see what we gave them as a gift. It's just a little strange. What do you guys think, are thank you note postcards an etiquette faux pas or nah?