# Payload Changes in the QR Code

* DIVOC certificates are natively digital, verifiable, digitally signed, and also printable with a secure and tamper-proof [**QR code**](https://divoc.digit.org/divoc-wiki-3.1/platform/divocs-verifiable-certificate-features-2.0/what-information-goes-into-a-qr-code)**.**
* The QR [**payload**](https://divoc.digit.org/divoc-wiki-3.1/platform/divocs-verifiable-certificate-features-2.0/divocs-native-covid-19-certificate-specification) structure is based on the [**W3C verifiable credentials data model**](https://www.w3.org/TR/vc-data-model/). 
* Previously, any changes in the QR payload required changing it in the certificate-signer service and subsequent deployment.
* With DIVOC 2.0, QR payload changes can now be made by changing it in etcd without any deployments.
* Currently, only the optional fields that already exist can be removed. New fields cannot be added as of now.
* Note: Do not remove the [**mandatory**](https://divoc.digit.org/divoc-wiki-3.1/platform/divocs-verifiable-certificate-features-2.0/what-information-goes-into-a-qr-code) fields.

### Steps to remove an optional field:

* Go to DDCC\_TEMPLATE. Click on the Edit key if you want to remove an optional field.
* Click on Save. A popup will appear as “operation successful.” Click on Close.

![](https://1377276962-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FyZ3Mr7sicTlPeSsH6Scq%2Fuploads%2F3mLOF2z1VYRFStLnJegO%2FScreenshot%202022-06-20%20at%208.50.52%20AM.png?alt=media\&token=4bb744f4-c8f4-48db-8da8-ac59faf0aa94)

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