![A client left this in the cash register when I attended her](https://preview.redd.it/r2giusf98unb1.jpg?auto=webp&s=8b7886bf43e27799dc038c9bf27d856ffe78b154)
Yesterday at work (I work at a supermarket in Madrid, Spain) a woman left this card holder with two blood donor licenses and behind the licenses this picture and these symbols. I have no idea what these means, any clue? Since I'm in Spain obviously I think that might me a cryptic message in Spanish. I would love to read your assumptions.
It’s a sigil mainly for protection