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Update: DocuSign also announced that it has received a strategic investment from

Seattle-based DocuSign today announced of the latest update to its electronic signature tools. The big vision, according to founder and chief strategy officer Tom Gonser, is to treat electronic signatures as a platform (yes, tech companies love that word) rather than “just a single e-sign product.”

In other words, DocuSign wants to do more than provide the technology to replace handwritten signatures with electronic ones. Today, for example, it’s revealing new collaborative features. Previously, DocuSign users would send out a document for signature, and the recipient could either sign it or refuse. That doesn’t reflect what is often a more complicated process filled with last-minute changes, and it creates a risk where, in Gonser’s words, customers will say, “Let’s put on the brakes, let’s print it out,” and therefore “fall out of the electronic process.”

Now DocuSign supports negotiation and document markup, where contracts can be edited and changes can be approved via electronic initials. It’s adding a feature for agents like attorneys and brokers to manage the signature process, and integration with online storage and collaboration service, so that users can perform the necessary DocuSign authentication within Box.

The company is also announcing its first big push on mobile devices. DocuSign now has a mobile-optimized website where users can read and sign documents from their smartphones. And there’s a new DocuSign application for iPads and iPhones, which includes sending, signing, and viewing capabilities as well as the ability to snap a photo of a document, add “sign here” tabs, then send it. And DocuSign is adding another layer of security through a partnership with Authentify, where users confirm their identify over the phone via a biometric voiceprint.

DocuSign says it controls more than 70 percent of the electronic signature market. It has raised a total of $38.9 million in funding from Frazier Technology Ventures, Ignition Partners, Second Century Ventures, Sigma Partners and WestRiver Capital, and it brought on Steve King as chief executive in January.

I’m told the company might be making some more “venture-related” announcements today, and will update this post if that’s the case.

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