Wish I saw this when I was in Geneva last week! I am going back for Sukkot, so I'm sure we can negotiate if anyone is interested
There is a point I would like to make. There are two Thomy mayo productions, one in Switzerland and one in Germany. Being very familiar with Rav Levy's hechsher (Zurich), I can tell you that it is accepted by everyone. I am not endorsing nor saying that the German ORD is not reliable, however I do not see it listed on the cRc website, and therefore I would advise to consult with someone knowledgeable beforehand. The main issue is the use of vinegar in the mayonnaise.
I am attaching pictures of the Swiss version and a screenshot of the Swiss kosher list.