CREDIT CARD AUTHORIZATION VENDORS
Less than 20 credit card associations and commercial vendors operate as third-party processors in the current marketplace. Credit card authorization vendors accomplish credit authorization on behalf of financial institutions and commercial vendors.
Vendors interface with retailers directly, and (indirectly) through value-added network (VAN) vendors and financial institutions.
Credit card authorization vendors at times utilize the networks of check verification/guarantee vendors to deliver credit card authorization services.
CHECK VERIFICATION/GUARANTEE VENDORS
There are two national (and less than 20 regional and local) check verification/guarantee vendors. These vendors offer check verification/guarantee services either directly to retailers or through financial institutions.
Check verification/guarantee vendors also use VAN vendors and credit card authorization vendor networks to deliver authorization/guarantee services.