[Petefine]

In my experience as a merchant, disputes can be very time sensitive (i.e. travel cancellations). On one hand, finding out about a misunderstanding from you (rather than a chargeback fax two months later) may allow a much easier dispute resolution and be so be valuable to a merchant. But on the other hand, customers who cancel/complain by charging back instead of calling the merchant may therefore lose a chargeback because they miss an agreed deadline. Adding your service as a middleman could lead to further missed deadlines.

This is especially true since any good merchant privacy policy/PCI DSS would of course prevent them from discussing anything with you without direct approval from the customer first - and if they did that, they may as well discuss the issue direct anyway.

Lastly, the toughest chargebacks can take months to resolve. Help with that (as a merchant) would be very useful(and so I can imagine you providing a compelling service), but are you really committing to take on a potentially complex issue for the customer? And wouldn't it be a conflict to represent both parties? Still, a tool that eases the admin of chargebacks could be great for both sides...