[plural] [noun]Formalities are things that must be done.To get a passport you have to go through a set of formalities such as filling in a form, getting the signature of someone who has known you for many years and sending in your birth certificate and a photo.We'll have to observe the formalities (= do what is expected).
FORMALITIES
Meaning of FORMALITIES in English
Cambridge English vocab. Кембриджский английский словарь. 2012