Unless you reside in a cave (in which case you likely will not be reading this), you are aware that we are moving towards a paperless society.  However, assumptions about providing documents electronically can be dangerous, and privacy rights must also be respected.  With respect to issuing Form W-2, IRS Publication 15-A provides the following:

Furnishing Form W-2 to employees electronically. You may set up a system to furnish Form W-2 electronically. Each employee participating must consent (either electronically or by paper document) to receive his or her Form W-2 ...

California law already prohibits employers with 25 or more employees from discriminating or retaliating against employees who take time off work for specified purposes related domestic violence, sexual assault, or stalking.  Assembly Bill 2337 (AB 2337) amends Labor Code section 230.1 to require that employers provide written notice of these rights to all new hires and, upon request, to current employees.  The bill also requires the Labor Commissioner to develop a form that an employer can elect to use to comply with this requirement, and when developed, to post it online.  The notice ...