/ aɪ ˈnaɪn fɔːm; NAmE / noun
( US ) an official document that an employer must have which shows that an employee has the right to work in the US
For more information see the Cultural Guide
I-9 FORM
Meaning of I-9 FORM in English
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005