To deal with the relations related to distributor you must be very much careful. There are many sensitive issue which must be dealt well to make a good relationship with your distributors.
A good way to do is to make and manage a distributor agreement. This is the reason that we have added a distributor agreement template here free of cost. This will give you a real life example in this regard so that you can get started with your efforts for it. How you will like it.
Here is a preview of this distributor agreement template.