The inevitable consequence of the spread of the boiled values were also the first cases of falsification occurring shortly after the introduction of the first stamp.
In addition to falsification, several counterfeiting stamps were echoed, for example, chromatic modifications or manipulation of stamps with higher values.
Another form of falsification was the reuse of used stamps made as new as a result of the chemical washing of the year.
Initially falsification had the purpose of defrauding mail: fakes had a lower cost than real stamps.
The fake or counterfeit stamps that evade the controls of the postal authorities by making an entire cycle of reuse are called "Public Phases".
With the development of the philosophies began the falsifications in order to defraud collectors.
In order to remedy these disadvantages, the postal authorities soon introduced anti-counterfeiting systems.
If from the first English issue - on the indication of Rowland Hill - the stamps were equipped with filigree, then additional techniques such as the use of colored paper, white paper with coloured silk threads (e.g. in Bavaria, Württemberg and Switzerland) and of lacquered strips (in order to prevent the removal of the postmark).