Sanctuary Thieves Guild
There is no formal Thieves Guild in Sanctuary. Instead, depending on where you work, who you target, and who you are working for, various pay-offs and percentages must be paid to the town guards, protection rackets, and street gangs. In general, a foreign thief targeting a local is not appreciated; in practice, if you can avoid the protections of your target, you've got a fair chance of avoiding taxation. However, if you are unfortunate enough to be caught working in someone's patch without having gained permission, or if you interfere with their business transactions, they are likely to fine you body parts. The head is the most common fine for a first offense. If you are particularly skilled, they may merely commission you to do some tasks that it would be politically or medically unwise for them to attempt.