Which one is the record of goods on credit?

Reduction in the price of a good is:

The written order to bank to pay stated sum of money to the person or business named on the order.

Which one is the request to the supplier to reduce the total of the original invoice?

If a business sell some goods on credit, it will issue:

Customer uses credit note record as:

A customer issues debit note to the supplier asking to reduce in:

Which note is some times printed in red?

Which one is allowed if the invoice is paid within a set time limit?

At the end of each month, a supplier usually will send: