It is necessary that we should know your location so that we can tell you to whom you should contact to have a license to become a car repo. But there are different organization which can be contacted and which provide license and also teach you about the rules and regulations and laws of becoming the car repo. Here is the link which will teach more about how to become Car Repo. And then you can look for institution which is providing license in your country to become a Car Repo. Link is given below
click here
click here