Recently, it has been circulated on the Internet that if the MPF is retrieved on the grounds of "permanent departure from Hong Kong", a "mystery envelope" will be issued by the MPFA, which states that the letter cannot be opened and must be returned at the designated departure time. Hand the envelope to the immigration staff at the time of departure. A Facebook page recently posted a post citing this information, with a link to apply for a credit card, which is very different from some previous posts on the “Secrets” page. The MPFA clarified that the post was untrue…