# Go-Live Checklist
source: https://developer.mastercard.com/mastercard-gateway/documentation/testing/go-live-cl/index.md

When you have completed testing for your integration, use the following checklist to ensure that you are ready to start processing live payments.

1. For all payment methods that you are using, first make sure that you have reviewed the instructions for customizing and testing your integration. Next, check that you have completed the required customizations and all relevant testing for each payment method.

2. For all security-related functionality that you are using, make sure that you have completed the implementation and followed any testing instructions.

3. Make sure that you have the credentials for your live merchant account (where the merchant ID does not have the `TEST` prefix). If not, request them from your payment service provider.

4. Update the merchant ID and API password in your integration to use the values for your live merchant account.

5. Perform several live test transactions using a real credit card, and validate that the transactions settle correctly into the expected bank account.

You are now ready to process live payments. If you need more information about the live environment, contact your payment service provider.