I'm at the tail end of a deal with a digital company similar to a hosting company.

We're negotiating on the value or ownership of the accounts.
There are 57 customers that have prepaid for the year, the rest are monthly accounts.

I brought up the fact that the money already paid should be mine, as the company has not delivered the services yet, and if things go 'south' and they all want refunds, I would be on the hook for all that $$ - basically a liability. They argue that there never are refunds, and if there is a problem, they would be happy to refund them as the need arises.

This is a rather grey area, both sides have points, but I'm unwilling to accept this as taking this revenue would severely affect the cash flow and sustainability, amongst many other reasons.

How do I counter this?