Maestro/Switch and Solo cards Some Maestro/Switch and Solo cards might require one of two fields for online transactions to go through correctly: Issue Number If your card has an Issue Number printed, please enter it on the order form. It is usually "01". Start Date (Valid From) If your credit card already has an Issue Number, it most likely does not contain a Start Date (Valid From). However, if it does, please select it on the order form. |