How can I reject a transaction when the CVV does not match?

1. Log into your Velox account by visiting https://secure.nmi.com/merchants/login.php
2. Click "Settings" under the "Options" category on the left side
3. Click "Card ID Verification" under "Security Options"
4. Select the options needed from those shown in this screenshot: 

If you have any questions, please call us at 408-295-8360.