Those applying for citizenship and not allowed to leave Soviet soil had a black mark placed on their files, which was used against them during the later repressions.
Need, kelle taotlus Nõukogude Liidust lahkuda tagasi lükati, said endale n-ö musta pleki külge, mida kasutati hilisemate repressioonide puhul nende vastu süüdistusena.