Why do people use cashiers checks?

People use cashier's checks because they provide a secure method of payment, as they are guaranteed by a bank and backed by the bank's funds rather than an individual's account. This makes them a preferred option for large transactions, such as real estate purchases or vehicle sales, where the recipient needs assurance that the funds are valid and available. Additionally, cashier's checks are often required in situations where personal checks may not be accepted due to the risk of insufficient funds.