I cut the greeting cards I have received into 4x6 pieces and then use them as postcards so the recipient of the postcard I have created can enjoy them as well. This is especially fun when you’re using the postcard to send a thank you to the person who sent you the greeting card in the first place.
Note: this only works if the greeting card doesn’t have writing on the reverse side of the picture.
Based on and in response to the following article.