# Confirm and Download
source: https://developer.mastercard.com/pay-with-rewards/tutorial/production-access/step3/index.md

## Confirm and Download {#confirm-and-download}

1. Click **Download key file** to download a zip file containing the .p12 file required for OAuth authentication in Sandbox. ![Confirm and Download Keys](https://static.developer.mastercard.com/content/pay-with-rewards/img/tutorial/downloadprodkeys.png)
2. When you click the Download key file above, a private key and Certificate Signing Request (CSR) will be generated. The CSR is uploaded to Mastercard, and you will be able to download the private key as a P12. This P12 is used to access the APIs on Mastercard Developers.
3. These files are generated in the browser, and only the CSR is sent to Mastercard, which ensures your private key is always private.
4. Once you complete this process, the Mastercard API Support team will review and approve your request for Production access.
5. You will receive an email from Mastercard Developers to your registered email address, depending upon the outcome of the review. Note: Typically, it takes 3-5 working days to review and approve the Pay with Rewards API Production access request.