Recently seen on Ebay (and purchased by the well-known revenue stamp collector Joe Ross): two South Korean documents with tax stamps. In itself, both stamps and the type of document are not particularly special: both stamps were easily available at the counter in South Korea until at least 2014, and unlike many types of documents that had to be paid for with tax stamps, this is precisely the type of document that the citizen does receive and can therefore easily possess.
It is in fact a piece of evidence, in this case a document that shows how often a South Korean has entered and left the country. What makes it special, however, is that both documents were created on the exact same day in 2006, probably for a mother and her son, but with tax stamps that were issued some 30 years in succession despite having the same value!
The tax stamps
These two tax stamps are used on the documents: