From the UPU .....

The designated operator of Australia, Australia Post, asks us to inform the designated operators of other Union member countries of a one-day strike by staff of the Department of Immigration and Border Protection, who are responsible for customs clearance in all inbound offices of exchange, on Friday, 12 August 2016.

This will cause delays to all inbound mail, both on 12 August and on the days following the strike, until the backlog is cleared.

Australia Post thanks all member countries for their understanding.