Wanted to let you ladies know about a tip someone told me. I think most of us know to write a number on the back of RSVP cards, so we can look up who it is from if one is returned without a name, but I went a step further.
I ordered a black light pen and it just arrived, and it works great! It came with two pens, and they each have a small black light at the end. I can write the guest's full name on the back of the RSVP and shine the light if it comes back unlabeled. It cost me $3 shipped on Amazon.
Below is a pic of the card without the light shining, and then with. I feel like a Harry Potter character...lumos!

