Philippines: OAV ballots returned to sender in LA, NY, Chicago, GMA News (2010).
This article discusses 1,000 overseas absentee ballot envelopes which were “returned-to-sender" as the voters failed to notify the respective Philippine Consulates of their forwarding address.
The link address is: http://www.gmanews.tv/story/190121/oav-ballots-returned-to-sender-in-la-ny-chicago