I am a little unclear about whether this is an on-line client or not? If he has a website nearly all webhosts are compatable with Authorizenet and then he just needs a merchant account. There are other merchants who work in the field or at tradeshows and use the same configuration. In those cases they just use Authorizenet as a virtual terminal at the time an order is placed. You can do this if wireless internet is available or if they have a laptop and a cel phone. Many cel providers e.g. Verizon allow you to use your cel phone as a modem and gain internet access that way. Is your client a US or CA client?

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Steven
http://EmerchantsGroup.com
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