Writing a $20 check involves filling out a pre-printed check form issued by your bank or financial institution. It serves as a written order to the bank to pay a specified amount of money ($20 in this case) from your account to the payee (the person or entity receiving the payment).
Checks are a convenient and widely accepted method of making payments for various purposes, including personal expenses, business transactions, and bill payments. They offer a secure and verifiable record of the transaction, unlike cash, which can be easily lost or stolen.