Signatures that can be erased easily aren't a great fit for a legally binding document. For more information, you can check whether the ink complies with DIN I

Signatures that can be erased easily aren't a great fit for a legally binding document. For more information, you can check whether the ink complies with DIN ISO 12757-2 and/or read up on "Dokumentenechtheit" [1] [1] https://de.wikipedia.org/wiki/Dokumentenechtheit https://de.wikipedia.org/wiki/Dokumentenechtheit (It hasn't been translated to other languages yet.)