This was done to remind us of when, where, and who was involved in such an event or transaction.
Journalizing or registering is an activity of registering transactions and events.
These journals register, not just the amount of the transaction itself, but also the names, dates, and places where the transaction was made. Whenever checks are used as payment, such a transaction is then registered in a journal called a Check Register or a checkbook ledger accounts. Checks are used in this period due to the dangers and perils -robberies and muggings - that come with the journey that early merchants and pilgrims take, which makes carrying gold in bulk an absolute inconvenience.