Advanced Merchant Solutions Pocket Verifier Lite 2.16
the author of this app says:
Accept credit cards and checks anywhere on your Pocket PC. Use any Internet connection to accept Visa, Mastercard, Discover, American Express and electronic checks. This is wonderful technology for any business, especially those that perform transactions at trade shows and construction sites. Unbelievably, this program is freeware. It's easy to install and offers tips and FAQs.