The libro diario is the accounting book where every transaction of the business is recorded in chronological order as journal entries. It is certified electronically at the Registro Mercantil each year, within four months of the close of the financial year, which locks in its content and gives it a certain date.
Each line of the journal is a journal entry with its date, its accounts, and its debit and credit amounts. Together with the book of inventories and annual accounts, it is one of the mandatory books for every company.
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