When you first enter employment in Hungary, your employer starts your social security booklet or health insurance booklet (“TB kiskönyv”). It is also called pink booklet (“rózsaszín kiskönyv”) for its color. It is in fact a long piece of paper folded to resemble a booklet, which employers can purchase in stationery shops.
Your first employer will fill in your data, most importantly your name, your Hungarian social security number, and your first day of employment. If you take a sick leave, it will be registered there too. When the employment relationship is terminated, your last day of employment will be added, and you finally receive this document together with your other exit papers.
In any case, your information is also registered in the online database of NEAK, the National Health Insurance Fund. Your booklet exists as a security measure, to have a personal, offline proof of your social security status as well.