Delete agreements from eSign

Hi all,

It is possible to completely delete an agreement (signed PDF, attachments, pictures and son on) from eSign? I'm using eSign with salesforce. I delete an agreement in my EchoSign Account Console and also delete all the agreement attachments in salesforce (not the agreement record itself, only the attachments including the signed pdf), but I notice that I can still see and download the signed agreement pdf in salesforce agreement detail page. This is a legal requirement or is possible to completely remove all the evidences of an agreement in adobe echoSign?

Thanks