Hi,
I offer to write an excellent letter of agreement (in English) for you that will certainly meet your requirements and clearly define all aspects of the relationship between your company and its clients, highlighting the red lines to not be crossed and preventing all possible kinds of mistakes. I have great experience writing all kinds of letters, reports, and agreements.
Despite the fact that I am new in this site, there is already a 5/5 feedback regarding motivation letters I wrote for someone like you.
Full details about your company, the products you sell, all potential dangers, disagreements, misunderstandings, product returns, refunds, etc., and associated local laws will be of great help.
Please, visit my page at freelancer for more information.
I consider doing serious business with serious and reliable people only.
Regards.