What is a statement of account?
A statement of accounts is a document that highlights all transactions that took place between you and a specific customer during a given time period. Business owners will generally send a statement of accounts to customers to remind them to pay any overdue balance for sales that took place on credit during that time.
They are also useful for the customer, not only to remind them to make the payment, but also to allow them to cross reference the invoices and credit notes with those on their own system. It could be that they have not received all the invoices on the statement, in which case they can request copies from the business to ensure that their own records will be accurate.