In this question re. Lisbon in WWII, an AI-generated answer (now deleted) contained the following text:
One of the notable aspects of the German embassy in Lisbon was its involvement in the so-called "Lisbon Diplomatic Conferences." These conferences were held in an attempt to establish a peaceful resolution to the ongoing war, and they involved representatives from various countries, including Germany, the United Kingdom, and the United States. While these efforts ultimately did not lead to a resolution, they showcased the diplomatic importance of Lisbon during the war.
My confidence in AI-generated texts is quite low, and googling for "Lisbon diplomatic conferences did not turn up anything useful. I know that WWII was not something that could have been ended on a negotiation table, certainly not from the British POV. And that a high-level negotiation attempt by one part of the German leadership ended in total and dismal failure (the Rudolf Hess flight in 1941).
On the other hand I do not really feel confident enough to just totally dismiss this either, e.g. there might have been tentative, but notable, contacts on a certain range of topics. Any ideas if the quoted text is related to any actual events?