I've seen the traffic police issuing tickets downtown for "all" car drivers wrongly parked. By the Corniche, they specially stop teenagers to check their driver's license or warn them about car stickers or illegal painting.

So, your observation about the car stickers having been removed, might be right, but not a proof that the two fines were written off.

Oh, and I like the pic, good that you made sure not display the car plate numbers..:)

Salam