Checkbook

A checkbook is a collection of blank demand deposit instruments.

The bank will issue you a set of paper documents with your bank account number preprinted on them. When you fill out the name of the payee, the amount and sign the instrument, the bank will honor the check. If you fill in the name, say John Jones, fill in the amount, say $100, and sign it, the bank will take $100 out of your account and give it to John Jones.

https://accounting.uworld.com/cpa-review/lc/accounting-dictionary/term/checkbook/