Has anyone here done anything to mark/identify your drone?
I added a Text file to my sd  card, offering a reward if found, with my email and phone #.
But I'd like to add a sticker of sorts with my phone#/email, in case I lose it. But that could easily be removed. So now I'm thinking of engraving the shell with my identity.
Any thoughts, ideas?

I have a label inside the flap on the rear of the mini2.

The text file on the SD card could also be deleted if the intention of whoever finds your lost drone isn't honourable. Having said that, the text file is a good idea.

On the Air 2, I used my label maker
On the Air 2S I purchased labels through the FAA when I registered it.

I'd thought of marking mine with a sharpie, but now considering something more permanent with my engraver.

I did the same, used an office label maker to save $$/time. Plenty of options on Amazon if you don't have one.

@Electromen  -- FAA offers labels after registration?? I didn't see that after registering my Air2 or Air2S.