I took my car to the garage and arranged with them to replace all 4 tyres. I'd order the tyres to the garage and they'd fit them. I also asked the mechanics to check the tyres manufacturing date and to let me know if they are older than 2 years. I'd arrange for a replacement if they are old because I want a fresh set of rubber.
The code on the good tyres is surrounded in an ellipse and there are 2 blank ellipses on the front left tyre. There should be a third one as well but it's not visible. It also seems like the area has been scratched a little bit.
Again, there are some slight signs of friction. You can argue the scratches occurred while fitting the, but I don't see how that could erase the date codes. It seems very unlikely that someone purposely scratched off the codes and I imagine it'd be very noticeable if someone did. But then again, the guys are professionals so maybe they can recover the scraped off rubber.
Is there any way to tell for certain if the tyres have been tampered with?