What type of sale indicates assured payment at the time of transaction?

A cash sale indicates assured payment at the time of the transaction because it involves a direct exchange of goods or services for cash or other immediate forms of payment. In this type of sale, the buyer pays upfront, which eliminates any risk of non-payment and provides the seller with immediate liquidity. This contrasts with other sales types, such as credit sales or installment sales, where payment is deferred or divided into scheduled payments, potentially leading to a risk of collection issues. In the context of business operations, cash sales play a crucial role in maintaining steady cash flow and reducing the complexities associated with tracking receivables.