Hello, @Munish veda
You are welcome to the Docusign Community!
A summary for Retention Policy:
“With a document retention policy, you can set the number of days to retain completed, declined, and voided documents. Setting a document retention period is optional. By default, Docusign securely retains all customer documents on the service for as long as the account is active.”
I recommend you to read this excellent Best Practices paper about the Retention Policy:
https://dsucustomers.docusign.com/km-guide-best-practices-for-docusign-document-retention-and-purging/1726516
Let me know if I answered your question.
Best,
Alexandre