The dual aspect concept states that since every transaction has a dual effect, the accounting records must reflect the same to show the accurate movement of funds. For instance, a buyer pays cash in return for a purchased item while the seller gains cash for the sold item. It makes a transaction dual, affecting two accounts simultaneously, and hence it should be registered likewise.
et’s say you buy a google play card worth $100 by paying $100. You will only debit $100 from your accounting books in a single-entry system as it is not based on the dual aspect concept. After debiting $100 from your account in the dual aspect concept, you will also credit $100 to your assets account like a $100 Google Play card.
It verifies the transaction by showing two sides of the coin. One is the side where money has been debited from your bank account, and the other is the side where the $100 Google Play.