I would guess it is an unathorised use of copywrighted material!
The ****** are damn good at this!
Had a situation a few years back where an airline contacted us to say that a unit we had repaired for them had failed on fit and that they wanted a replacement, we had never dealt with the airline before. Seems that they had been approached by an "agent" for us and had been buying aircraft spares and having repairs done for about a year, they had copies of our certification signed by the right inspectors with stamps etc, turns out it was a local triad gang who had copied all our certification paperwork etc to sell "certified" aircraft parts! :nervous: