Final answer:
A bill from a seller to request payment from a purchaser is known as an invoice, which can be settled using payment methods such as debit or credit cards.
Step-by-step explanation:
A bill from a seller to request payment from a purchaser is called an invoice. This document specifies the products or services provided, their quantities, prices, and the total amount owed. Different payment methods can be used to settle the invoice, such as a debit card or a credit card.
When a customer uses a debit card, it functions similarly to a check, with funds being transferred directly and immediately from the customer's bank account to the seller. On the other hand, a credit card transaction transfers funds immediately from the credit card company to the seller, with the user then owing the amount spent to the credit card company at the month's end, essentially acting as a short-term loan.