27. The non-transitory computer readable storage medium of claim 25 , wherein the authorship identifier includes an email address for a purported author of or contributor to the first document, and wherein the email address is an email address in the first domain.
27. The non-transitory computer readable storage medium of claim 25 , wherein the authorship identifier includes an email address for a purported author of or contributor to the first document, and wherein the email address is an email address in the first domain. 28. The non-transitory computer readable storage medium of claim 27 , wherein prior to conditionally confirming the authorship of the first document, the at least one program includes instructions to request that the entity confirm that the email address associated with the profile for the entity is the email address that the entity includes in documents authored by the entity.