I am afraid we are going to see more of this...
More and more businesses (especially financial orgs) are pushing the 'save a tree, get an email' agenda. With the postal service, put a first class stamp on it an it is legally 'deemed received'.
However, this does not translate to email. Hitting 'send' does not mean the email was necessarily received. I am currently fighting a false positive problem with my ISP's anti-spam technology where legitimate bills & statements are getting routed to a junk folder. This results in missed communications that potentially have financial implications. Unfortunately businesses are doing a CYA with a forced EULA absolving them of responsibility.
As I reflect on this, it is surprising to make this conclusion... For all their faults, the postal service loses far less important communication than modern electronic communications.