The new currency law was signed by King Chr. IX on Amalienborg Castle 23.5.1873. This resulted in a currency reform from 1.1.1875, where skilling was replaced by øre, whereby the blue 2 skilling and the red 4 skilling postal cards were replaced by blue 4 øre and red 8 øre postal cards. After the currency reform the use of skilling postal cards was possible up to 15.1.1891 when they were announced invalid in Officielle Meddelelser (Official Notices). Therefore is it possible to find skilling postal cards used in the øre period, but also mixed frankings (skilling/øre) can be found.

4 skilling postal card upfranked with 2 x 4 øre stamps.

The most common mixed franking is 2 skilling postal cards with 4 øre stamp.

Skilling postal cards (issued 1.4.1871) could also be used after the currency reform (1.1.1875) untill 15.1.1891.