To resolve the issue of "pay on delivery not working" for your Domino's Pizza order, follow these steps:

1. Check Payment Options: First, confirm that your preferred method of payment for delivery is accepted by your local Domino's. Most Domino’s stores accept cash for deliveries, but some may have limitations or may not allow pay on delivery in certain circumstances - learn more.

2. Select Pay on Delivery: When you place your online order, select the "Pay on delivery" option. Ensure that you are not trying to use a payment method that could malfunction, such as a card that might have restrictions - learn more.

3. Immediate Call to Store: If you experience issues with the payment method, consider selecting cash on delivery initially. After placing the order, call your local Domino's and inform them that you would like to pay with a credit or debit card when the delivery arrives. They may accommodate this request - learn more.

4. Confirm with Customer Service: If the issue persists, contact Domino's customer service. You can find the contact information on the Domino's website or within your order confirmation email. This step is crucial because they can address specific problems related to your account or store policies - learn more.

5. Check Internet Connection: Ensure that your internet connection is stable. Issues with connectivity may disrupt the payment process, causing it to fail unexpectedly.

6. App/Website Updates: If you are ordering through the Domino’s app, ensure that the app is up to date. Older versions may have bugs that affect the checkout process. If you are using the website, try clearing your browser's cache or switching to a different browser - learn more.

7. Try Alternative Ordering Methods: If online ordering continues to fail, try placing your order through another channel, such as calling the store directly or using a different device to see if the problem persists.

8. Feedback and Follow-Up: After resolving your immediate payment issue, consider providing feedback about your experience to Domino's. This can include whether the payment options were clearly specified and if you encountered any technical difficulties, as your feedback may help improve their services in the future - learn more.

By following these steps, you will likely be able to solve the issues you are experiencing with the pay on delivery option at Domino's Pizza.