[carsonm]

Shopify might be worth considering, they have a pretty good POS system (http://shopify.com/pos), and probably more experience dealing with these sorts of shenanigans, plus you can get them on the phone.

And you don't have to sign up for the whole POS system to get the card-reader for your phone/iPad. Their mobile app (available to any Shopify shop owner) ships out a free reader. http://www.shopify.com/blog/11013977-introducing-shopify-mob...

[dangrossman]

I wonder if Shopify actually has any input into the chargeback process and risk evaluation of accounts. Shopify Payments are "powered by Stripe" rather than something they run themselves. They do have a nice integration and you get a discount compared to using Stripe directly without any minimum volume.