On a check, what is the term for the amount written out in words?

The correct term for the amount written out in words on a check is the "amount line." This is specifically where the payer indicates the dollar amount of the check in written form, such as "One thousand dollars." Writing the amount in words helps prevent alterations and misinterpretations, as it adds an additional layer of clarity and security to the transaction.

The other terms, while they might relate to different aspects of a check or financial documentation, do not accurately describe the written amount. The numeric line refers to the section where the amount is written in numerical form, while "total line" and "payment line" are not standard terms used to describe the written amount on a check, thereby making the amount line the best choice.