Apparently my grand-mother left Yugoslavia in the late 1950's and was therefore put on a "list" of some sort for leaving the country. When she came back around 1965 she was tracked down on the train north in todays Croatia, and was brought in for questioning. Do you think this actually happened, based on your knowledge of Yugoslavia back then, or has my grand-father just made her story more interesting?
Here's a previous answer to a related question https://www.reddit.com/r/AskHistorians/comments/64dh9c/did_all_communist_states_in_the_world_impose_a/?utm_source=reddit-android