I've been wondering if my new note 20 ultra's box might've been opened. When I got the phone from my local dealership, the box had just one seal on the bottom left (if you're looking at the box from the bottom side) and the seal says 'Indian Sim Card Only'. The seal was intact, but there wasn't another seal on the top right side of the box.
In India, is it that we just get one seal on the box? Because in some YouTube unboxing videos, I've seen boxes with 2 seals.
My doubt grew stronger as the phone did heat up quite a bit on my first use, probably around 40-45°C. But it's been better since.
Go to settings, then to About device and then to status and see the phone status, if it says "Official", you are good to go. Also, keep in mind that any phone you buy, it is bound to heat for the first 2 to 3 days because it undergoes several changes.
My Samsung Note20 Ultra Box also got double seals with barcode no GH68-51407A which pasted on another sticker GH68-51397A (this seal smaller than another one)