We knew that people were buying diplomatic passports. We even had an idea about how they were doing it. But in order to get the full story, we had to try to buy one. In part three of our investigative series, we send someone undercover to try to purchase an ambassadorship.

Subscribe to Al Jazeera Investigates and catch the next series later this spring: Find it on Apple Podcasts, Google Podcasts, Stitcher, or wherever you listen.

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