What is the format for the numbering scheme for Flight Controller SN?
I couldn't tell whether it's a capital letter 'O' or the number zero/'0'
or maybe a combination of both???

They are zeros.

msinger Posted at 12-12 05:57
They are zeros..

Thank You!!!

"Usually" there are NO letters "O" in Serials, because it is so easy to missread them as 0 (Zero)
Not just at DJI, "usually" always!

If the numbering scheme were just ALL numbers (Serial Number) then it would make sense but starting it with a number zero is NOT the most logical.

Hello and good day FerdiKC. Thank you for the inquiry. For the serial numbers for both the DJI Drone and the Remote Controllers there is no letter "O" included only the number Zero is included on the serial number. If you have any other concerns or inquiries about DJI. Please feel free to post it here at DJI Forum. We are here to help you.

DJI Stephen Posted at 12-12 06:34
Hello and good day FerdiKC. Thank you for the inquiry. For the serial numbers for both the DJI Drone and the Remote Controllers there is no letter "O" included only the number Zero is included on the serial number. If you have any other concerns or inquiries about DJI. Please feel free to post it here at DJI Forum. We are here to help you.

Clearly noted. Thanks for the assist.

FerdiKC Posted at 12-12 07:09
Clearly noted. Thanks for the assist.

O is Fat while 0 is not

FerdiKC Posted at 12-12 07:09
Clearly noted. Thanks for the assist.

You are very much welcome FerdiKC. Have a safe and happy flying always.

SAADHERO Posted at 12-12 07:44
O is Fat while 0 is not

Lol
This one got me
Nice one