Invoice vs quote vs credit note
Who sends each document, when, and what it does to the money — with a real project sequence.
How to write an invoice
The seven parts of a US invoice, a worked example, and the mistakes that delay payment.
Proforma invoice vs invoice
When to confirm an order and when to actually ask for the money.
Deposits and retainers
Show the deposit, deduct it from the final invoice, and avoid double-billing.
Net 30, Net 15, due on receipt
How to choose payment terms, where to put them, and what to send when the due date passes.
Make a document
Invoice Quote Proforma Credit note Purchase order Work order Delivery note Timesheet Expense report Statement