In this movie, Chunky Pandey plays a serious cop while Sunny Deol plays a cheerful convict. In the 1992 movie "Vishwatma", their roles are reversed.
Paap Ki Duniya is a remake of Manmohan Desai's Parvarish, Pran played Shammi Kapoor's role, Sunny Deol played Vinod Khanna's, Chunky Pandey played Amitabh Bachchan and Danny played Amjad Khan's role.
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Pahlaj Nihalni signed Dharmendra for the film, but Dharmendra requested he take Sunny Deol instead. He promised Pahlaj if he took Sunny, he (Dharmendra) would do Pahlaj's next film for half his market price.
First of five films in which Sunny Deol and Chunkey Pandey appeared together. They would go on to star in Vishwatma (1992), Lootere (1993), Insaniyat (1994) and Kasam (2001).
The song chori chori yun jab ho aankhen char was inspired from "walk like an Egyptian"