Actually had that happen in Liberia, Costa Rica. Mess up on our credentials leaving Nicaragua and entering CR. At Airport, couldn't leave or acutally come in!@! We were not welcome anywhere because of improper passport controls. What a fiasco. I know what it feels like!!! Can you imagine trying to go through the process and be turned away from flying Delta home and turned away at the border!! What an experience that I never want to relive. I am glad that Delta helped us out and lucky to say...we are home safe in Pennsylvania Dutch Country!!!