Hi Pb,
Sorry for the delay in response.
Yes, it is possible to delete the agreement in V6 API.
There is a setting that needs to be enabled from the backend.
In this case, I would suggest you contact the support team directly so that they can look into this for you.
For the subscribed account, find below the steps to contact support:
• Login to your Adobe Sign account directly via https://secure.echosign.com/public/login
• Once logged in, check the upper right corner of the page and click the question mark icon.
• It will re-direct you to the page where you get the option to create the support case or to start a chat with the team.
• If you've never logged in this way, use the forgot password option on the login link to set your password.
Let us know if you need any help.
Regards,
Meenakshi