I need to find a shopping cart solution that doesn't require user registration

[YourUncleBob]

I need to find one that doesn't require user registration to purchase (I want to set it so the customer isn't even offered the option).

Also my company uses "first data" as their b&m card processor so if you know something that can work with them out of the box then that would be really great too.

Thanks for reading, whenever I try to use the search function the forum logs me out so if you know of an older thread where this is answered I would be grateful for a link!

-Bob