I’m interested. Difficult to read is still better than no picture at all…
I don’t have any information if (and how) that may be done in Germany, which could be because they don’t want anyone to get ideas how to trick the system…
In Germany, in addition to the dateless and locationless “Nachträglich entwertet” stamp that every mailman is supposed to have, cancellation with the full regular date stamp is permitted as well, in that case a large N (for nachträglich) must be written next to the date stamp. I’m not sure if that’s allowed for foreign stamps as well.
Finally I have dug out an “Ortswerbestempel” from Germany. It’s advertising for the town, and it’s a regular cancellation, all outgoig mail from the mailboxes in that town was cancelled with it. Note: As the cancellation is from 1972, it uses the old West German 4-digit postal code (East Germany also had a 4-digit postal code, but it was in the top of the cancellation). When after reunification (1990) the new 5-digit postal codes were introduced on 01-Jul-1993, those towns willing to pay for a new stamp got a new one (same or different design) with the 5-digit postal code. All Ortswerbestempel were discontinued with the introduction of the Briefzentrum (letter center), the initially 83 Briefzentren (now 82) were opened between 1994 and 1998. So depending on location these cancellations vanished at different times.
Top: Edenkoben (town name)
bottom: 6732 (postal code)
a bit higher: -9.6.72-13 (date: 09-Jun-1972, at 13:00 / 1 PM, the time is not time of cancellation but time of mail collection or office closure (some offices close over noon)
above that: advertisement, illustration of wine grapes and sun, text “staatl. anerk. Luftkurort”
left: “Wald u. Wein” (forest and wine)
right: “Sesselbahn” (chairlift)
Sometimes mistakes happen. Here the advertisement part (government advertisement to work together against COVID-19) was inserted upside-down in Briefzentrum 68:
here’s an early inkjet cancellation from the test phase, Briefzentrum 48 dated 29-Nov-2018 with two advertisement spaces - the final machines, e. g. at Briefzentrum 60, only use one space, but I don’t know if the second space is still technically possible.
Large envelope inkjet cancellation (never has advertisement): Briefzentrum 20, dated 26-Aug-2020-21
Inkjet cancellations are not error-prone… double cancellation, one regular orientation, the other upside-down, Briefzentrum 20, dated 23-Nov-2020-21, large envelope cancellation machine (I’ve never seen upside-down inkjet cancellation from the regular-size mail machine).