Not in Croatia, but I have experienced corruption as a tourist in Serbia and Bosnia:
- Serbia: Driving in Novi Sad, and another driver illegally passed me and hit my car coming back into traffic, causing a few hundred euro in damage to my car. He got out and yelled me and then drove off before exchanging any info. I had photos of his license plates, but multiple Serbian friends advised me to not deal with it because it would ultimately come down to who was more able to deal with the nuance of bribing the police. On the other hand, I once stupidly left my Macbook Pro on a flight landing in Belgrade, and it ended up in the hands of the airport police, who handled everything professionally.
- Bosnia: Driving into the country, with insurance that's valid in Bosnia (and every country in Europe), which it says right on my insurance form. The immigration officer denies this and sends me over to his buddy 20m away to buy "Bosnian insurance". Only €30, but definitely corruption.
- Serbia: Driving in Novi Sad, and another driver illegally passed me and hit my car coming back into traffic, causing a few hundred euro in damage to my car. He got out and yelled me and then drove off before exchanging any info. I had photos of his license plates, but multiple Serbian friends advised me to not deal with it because it would ultimately come down to who was more able to deal with the nuance of bribing the police. On the other hand, I once stupidly left my Macbook Pro on a flight landing in Belgrade, and it ended up in the hands of the airport police, who handled everything professionally.
- Bosnia: Driving into the country, with insurance that's valid in Bosnia (and every country in Europe), which it says right on my insurance form. The immigration officer denies this and sends me over to his buddy 20m away to buy "Bosnian insurance". Only €30, but definitely corruption.