United States Shortpaid Incoming Mail to "Luxenburg France"

Luxenburg, France?

  
Louisville, Ky. 

Station H (DPO)

22 Aug 1919

Shortpaid 3 US cents

Taxed Double the Deficiency 

Luxembourg-Ville

15 Sep 1919 

30 centimes postage due paid

In the early 19th century, incoming mail incorrectly addressed to "Luxembourg, France," "Luxembourg, Belgium," and "Luxembourg, Germany" all seems to have been delivered.  But last week a letter I sent to a collector in Fentange (population ~1600) showing the street address but inadvertently omitting the street number was returned as "undeliverable." 

Things sure have changed!

Other examples of similar incorrectly addressed mail are here and here.