If your outlet does not allow cashier staff to use delete park access. In this case, authorization is necessary so that your cashier staff can access it if any of your customers cancel an order that is already parked.
The steps below will explain how to create a coupon promotion for deleting park orders.
I. How to Generate Coupon
Step 1. Click Add at Promotion Coupon tab

Step 2. Choose Type Generate
When you want to create a new coupon, you have two ways to generate the code from the coupon itself, that is :
Manual Typed : You manually input the coupon code that you want to generate

Automatic Typed : You only need to input the number of coupon codes you want to create and total digit of coupon code

Step 3. Choose Coupon types 'Authorization code to enable DELETE parked order'

Step 4. Set Coupon Usage Limit, Expired Date and Description then Submit

Coloumn | Description |
Usage Limit | Add coupon usage limit |
Expired date | Add expired date for using the coupon |
Description | Add a coupon description (optional) |
Step 5. Promotion Coupon Created

II. How to Use Coupon on Sell Menu
Step 1. Go to Sell and select a product and park the order

Step 2. Click retrieve
If you do not have access to delete park order then when retrieving there is no cross for delete park order

Step 3. Input Coupon Code
But the cashier can delete the park order by input the delete park order coupon

After the coupon for delete park is entered, the cashier can delete the park order

You might also like to read these articles below:
To make a promotion coupon for discount percentage, you can check this article Coupon for Discount Percentage
To make promotion coupon discount Amount or gift voucher, you can check this article Discount Amount / Gift Voucher
To make a promotion coupon return, you can check this article Coupon Return - Authorization to enable sales return