i would like to know i am a non-us citizen, i already register with FAA, do i need to do a marking on my mavic?

Yes, the FAA numbers you received when you registered it. They'll need to be displayed when flying in the US.

I've been also looking for the guide how to register and what to do next. Here's what I've found (a couple of discussions):
The thing is that I need to move back to the US. However, I'm from Europe and I can't find my FAA registration numbers, when I registered a couple of years ago. Do I need to register again? Thanks.

I've been also looking for the guide how to register and what to do next. Here's what I've found (a couple of discussions to write my paper):
https://moodle.com/news/inspired-open-source-solution-learning-analytics-project-inspire/
https://amablog.modelaircraft.org/amagov/2016/06/20/faa-non-citizen-registration/

The thing is that I need to move back to the US. However, I'm from Europe and I can't find my FAA registration numbers, when I registered a couple of years ago. Do I need to register again? Thanks.

briansagess Posted at 5-28 01:42
I've been also looking for the guide how to register and what to do next. Here's what I've found (a couple of discussions to write my paper):
https://moodle.com/news/inspired-open-source-solution-learning-analytics-project-inspire/
https://amablog.modelaircraft.org/amagov/2016/06/20/faa-non-citizen-registration/

I believe that if you log into your account the information should be available to you :-

https://faadronezone.faa.gov/#/