I did not realize my FAA number had to be on my drone until a few days ago. So being the law abiding citizen and responsible drone operator I registered my drone with reclaimdrone.com and got a sticker set to place on my drone. It was under $4 eBay and the biggest frustration I had was how to get the backing off. But after trials and tribulations and a crafty neighbor I realized fold the sticker long ways and it parts in the middle. I had my friend go to the website and look up my number and I got an email that somebody found my drone. This worked out well just letting everybody know.