You can lock or unlock your Rho Card (or your employees cards) from the Cards tab using Rho.
To lock a card, go to the card you want to lock, then click on the Actions button on the right side of your screen, as seen in the picture below. Select Lock Card.
A confirmation window will display. Click the Yes, Lock Card button.
Once a card has been locked, it will be inactivated and displayed in the Inactive Cards section of the My Cards page.
To unlock a card, follow the same steps, but click Unlock Card in the Actions menu. On the confirmation window display, click Yes, Unlock Card, and you'll then be able to use your card.