In the spring of 1944, the Holy See tried to be helpful by approaching the governments of Latin and South America to ask them to take refugees. While this was definitely not a bad idea, the Vatican didn’t make it clear to these countries that they were not ACTUALLY expected to harbor immigrants, but just to agree to do so.  If the Allies could indicate to the Nazis (or to the neutral nations) that refugees would at least nominally have a place to go, the refugees might be allowed to reach safety.  Without the assurance that refugees would not actually arrive on the shore, some of the countries refused to consider the idea.  The WRB had to go back to all the countries, make assurances, and plead again for them to agree.