Sounds like they are already hiding sales. They would be resistant to having sales orders written or logged for fear of verification and more.
Maybe it's time to find a new outlet?
My client and partner in an upcoming upscale retail site takes all his orders from phone calls and emails, and wishes to NOT add an 'add to cart' e-commerce solution to the site. He wants all customers to continue to ONLY order by phone or email, as they have in the past. My question is how can I be sure he is paying me my percentage of website sales accumulated with him being the only one keeping track of phone and email orders, if at all? I have looked into things like Google Voice (filtering all sales calls through a Google number we can track), but does anyone know of another way for us both to keep track of what sales are calling/emailing in from our website? He is paying me for a percentage of website sales, NOT one's that come in to him directly. HELP!!!