What is a signature with a qualified certificate hosted by Docuten and how is it used?

This type of signature enables the use of digital certificates issued in the name of the signatory and are securely housed in the Docuten certificates store. 

You can use a qualified digital certificate hosted by Docuten. This type of digital certificate will have been previously issued by a certification authority (such as the “National Coinage and Stamp Factory – Royal Mint” in Spain, for example) to the signatory, and is linked to his or her ID number.

Check out the following link to see how you can sign a document with qualified certificate hosted by Docuten: