If an entry is posted on the wrong side of the relevant ledger account, the effect would be that both the entries relating to the transaction would be on the same side of ledger, thereby causing the trial balance to go out of agreement.
An invoice for $520 issued to Sara was entered correctly in the sales book but posted to the credit side of his personal account in the ledger. It follows that whereas the sales account would be correctly credited. Sara’s personal account would have a Cr. entry of $520 instead of a Dr. entry of that arnount. To rectify this error, we will need to debit his personal account by twice the amount with the corresponding credit entry appearing in the Suspense Account.
An invoice for $2,430 received from Sydney Traders was recorded correctly in the purchases book but posted to the debit of Sydney Traders account. It follows that Purchases Account would be correctly debited whereas Sydney Traders Account would have a Dr. entry instead of a Cr. entry for $2,430. To rectify this error, we will need to credit Sydney Traders Account by twice the amount, i.e. $4,860 and credit the Suspense Account to complete the double entry.