I had a terrible morning in Chiang Mai dealing with a motorbike return. I rented a 125cc from Eak Motorbike Rental, which I picked up at a hotel on Ta Phae Road. I paid 250B per day for 2 days. A woman arrived by moped to fill out the contract, taking photos of the bike for damage control, and then took my passport as deposit. As soon as she left and before I left the property with the bike, I saw that the one of the mirrors on the bike had cracked. I hadn't even touched it! I immediately went inside the hotel and asked the reception to come and take a look so she could inform the rental agency. It wasn't my fault and I did not want to be charged when I returned the bike. She looked and said she would call and it was not a problem.
When I went to return the bike, the rental woman arrived with a man that I had not seen before. He immediately said I had to pay for the mirror or he would not return my passport. I explained that the mirror had cracked before I even touched the bike, and he said he understood but I still had to pay. I went inside the hotel to ask for the reception lady who was witness to the broken mirror before I left the property, and when we came back outside, the motorbike rental people had LEFT WITH MY PASSPORT!!!
The hotel woman called them back and told me they would return in 10 minutes. I had a bus ticket booked to leave Chiang Mai that day and it was getting late. The man and woman returned eventually and the man kept repeating that I either pay him for the mirror or I would not get my passport back. I was upset as it really was not my fault. He then got back on his moped and threatened to leave again.
I had to pay. After all this I was too late for my bus and had to buy a new ticket. It was a terrible experience all around. Don't rent from these people! They may accuse you of damage and drive off with your passport as well!