Wobei es sich hier nicht um Vorausentwertungen handelt, siehe die Webseite "Precancels of Great Britain" http://gb-precancels.org

Dort werden diese " Commercial Overprints" unter der Teilüberschrift "Not Precancels: These are things that are sometimes mistaken for precancels." (d.h. übersetzt "Keine Vorausentwertungen: Diese Dinge werden manchmal irrtümlich als Vorausentwertungen bezeichnet") behandelt.



... usually overprinted with the name of a local authority or utility company to prevent petty-theft much in the same way as perfins. The difference is that these were used for receipt purposes at a time when duty was payable hence some have 'Received for' as part of the design. When this duty was abolished in 1971, the unused stocks could be used postally for a period of 6 months.

Gruß
Thomas