Unexplained election expenditure based on a seized notebook...

Unexplained election expenditure based on a seized notebook requires proof that the document belongs to or is linked with the taxpayer and independent corroboration of its entries. A notebook recovered from separate commission-agent business premises, without the taxpayer's name, verification from named persons, or other correlation, does not by itself establish unexplained expenditure despite the statutory presumption for seized documents. Undated alleged campaign payments must be assessed in the year supported by campaign, polling, search, and entry-related facts; meeting-schedule dates do not establish the year of payment.