Things to know when dealing overseas (specifically in Italy):
1. Always keep your receipts: Many vendors print your complete credit card information on receipts and they may later try to charge you for things you already paid for.
2. There is no better business bureau: Not that the BBB is super effective but it does carry a certain amount of weight. If you rent from an international chain you are at least guaranteed to have local options when making complaints.
3. The mentality is snatch and grabs: In most tourist spots (especially in Italy) the mentality is that people are going to only come once so you may as well screw them as much as you can when they do come. They don’t think of repeat customers.
4. They will steal your car: This one may seem confusing. Here’s what happens, you rent a car, they steal it back at night and then charge you the insurance deductible. Use a club or something. Make sure your stuff is locked up tight.
Read more about some specific experiences: