I'm not sure why. They also should give you a discounted rate. If any insurance were to be paying there's some sort's of white off's. Plus they're getting paid right away, not having to wait for a insurance check at least a month later. This is pretty much standard practice. The only reason I would think any business doesn't want cash would be because they'll have to pay taxes on that amount. Just a little more about cash payments.
I can't answer this particular question. Wish I could
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