You can look up past and present orders by using the last 4 digits of a customer's credit card. Toast provides two methods to find credit card orders:
Method 1: Lookup
Under the Quick Order screen, select the Look Up icon.
A prompt will appear allowing you to swipe the customer's credit card to find the orders.
Method 2: Find Checks
The second method is done in the back end of Toast. Navigate to Find Checks under the Manager section.
Select Find by Credit Card and enter the credit card's last 4 digits, then select Search.