In a press statement in which they announced the release of the second batch of bond notes, the Reserve Bank of Zimbabwe spoke on the rubbing off of ink and variation of security thread on the notes.
The RBZ said:
The Bond Notes are of high quality with many security features to make them secure. The rubbing off of ink and the variation of the security thread on the notes are quite normal.
It also spoke on the release of the $5 note saying that it will be released into the market in due course.