New Date Variables: Date Submitted & Signature Date
We need a variable for when a document is submitted to a receiver. For example. this date variable would be used in the cover letter or the agreement effective date. It would be populated with the date the document is sent to the recipient.
The second date variable/field is Signature Date. This date would be populated with the date a person signs the document. This field would be associated with the signer of the document and populated automatically when they sign the document.

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Eric de Vos de Vos commented
I also really like this idea. Being able to use a Document.SendDate in a document that is updated on sending, makes it easier to distinguish differente revisions of the samen document (for example after processing feedback of a client).