Switzerland rejected over 39,000 refugees, most of them Jews, and asked German authorities to stamp Jewish passports with the letter J in order to identify them to Swiss border agents. In 1942, it explicitly closed its borders to Jews entirely. Here's the AP News on the subject, since you're not aware: https://apnews.com/article/0be18d0f36c04b86d7592bc6b16f7fa6