The <a href="https://en.wikipedia.org/wiki/Postal_Service_Act" id="mwOw" rel="mw:WikiLink" title="Postal Service Act">Postal Service Act</a>, establishing the <a href="https://en.wikipedia.org/wiki/United_States_Post_Office_Department" id="mwPA" rel="mw:WikiLink" title="United States Post Office Department">United States Post Office Department</a>, is signed by United States President <a href="https://en.wikipedia.org/wiki/George_Washington" id="mwPQ" rel="mw:WikiLink" title="George Washington">George Washington</a>.