Pocket Verifier Lite 2.15 (Mobile)
Source: Advanced Merchant
From the developer: ""Accept Credit Cards and Checks anywhere, on any Palm OS compatible PDA! Works with wired or wireless Internet connections! Accepts Visa, Mastercard, Discover, American Express, and also allows you to accept checks electronically! Accept credit cards now, and increase your sales. Credit Cards give your customers time to pay, and funds to pay with. ""Improved communication / error handling, also Includes PC Verifier internet access for PC and MAC merchant banking.""