This document discusses rectification of errors in accounting. It defines four types of errors: omission errors, commission errors, principle errors, and compensating errors. Omission errors occur when a transaction is not recorded, while commission errors happen during posting and balancing. Principle errors involve incorrectly classifying revenue and capital items. Compensating errors occur when incorrect entries offset each other. Errors are located through statements, audits, comparing Trial Balance debit and credit totals, and checking subsidiary books. A suspense account is used temporarily to hold differences in the Trial Balance until the error is found. Rectifying entries are passed to correct the books once an error is identified. Errors can affect profit calculation if they involve Trading, Profit and