primary document

Translations
основной документ
первичный документ
исходный документ
главный документ
Definitions
The main or most important document in a collection, process, or case.
An original document that serves as the source for copies, summaries, or subsequent records.
In accounting or administration, a document that records a transaction or event and serves as the basis for bookkeeping or further processing.
Words
primary

adjective
основной
document

noun
документ