Final answer:
A journal page number is written in the Post. Ref. column of an account in accounting to indicate that the entry has been posted to a ledger, which is true. This provides a reference to the original journal entry and is essential for record-keeping and auditing.
Step-by-step explanation:
True. In the context of accounting, when an entry from a journal is posted to a ledger account, the page number of the journal is written in the Post. Ref. (posting reference) column of the account to indicate that the posting has been completed. This process ensures that each entry from the journal is properly transferred to the relevant ledger accounts and provides a clear reference back to the original journal entry if review or audit is required later. The posting reference is crucial for maintaining the integrity of the accounting records and facilitating traceability.