If your Expend card has been lost, or you suspect that the card details are being used for illegitimate purchases, you can lock the card to prevent it from being used for any purchase transactions.
In the Expend app:
Tap Cards at the bottom of the screen.
Select the card.
Tap Lock Card.
On the dashboard:
Go to app.expend.io and sign in with your Expend account details.
Click Cards in the menu on the left.
Find the card and click the ⚙ (Card Security Settings) button in the lower right corner.
Click the Enable card setting so that it slides to the OFF position.
Click Close. The card is shown as Locked.