https://keeninvoice.com/blog/ Guides to invoicing and getting paid, and news from KeenInvoice. en Sun, 18 Oct 2026 00:00:00 GMT https://keeninvoice.com/blog/how-to-make-an-invoice/https://keeninvoice.com/blog/how-to-make-an-invoice/Sun, 18 Oct 2026 00:00:00 GMTHow to make an invoice step by step: what to include, how to number it, which payment terms to use, how to send it and follow up, and the mistakes to avoid. https://keeninvoice.com/blog/how-to-number-invoices/https://keeninvoice.com/blog/how-to-number-invoices/Sun, 18 Oct 2026 00:00:00 GMTWhat an invoice number is, why it must be unique and sequential, common formats like INV-0001, and how to handle voided invoices, gaps and multiple series. https://keeninvoice.com/blog/introducing-keeninvoice/https://keeninvoice.com/blog/introducing-keeninvoice/Sun, 18 Oct 2026 00:00:00 GMTWhy we built KeenInvoice, a free invoice generator with no sign-up or watermark that keeps your documents in your browser, and what this blog will cover. https://keeninvoice.com/blog/invoice-vs-receipt/https://keeninvoice.com/blog/invoice-vs-receipt/Sun, 18 Oct 2026 00:00:00 GMTInvoice vs receipt explained: an invoice asks for payment, a receipt proves it was made. A side-by-side table, the timeline of a sale, and when you need each. https://keeninvoice.com/blog/net-30-meaning/https://keeninvoice.com/blog/net-30-meaning/Sun, 18 Oct 2026 00:00:00 GMTNet 30 means payment is due 30 days after the invoice date. How to work out the due date, other terms like Net 60 and 2/10 Net 30, and how to use them. https://keeninvoice.com/blog/what-is-a-proforma-invoice/https://keeninvoice.com/blog/what-is-a-proforma-invoice/Sun, 18 Oct 2026 00:00:00 GMTA proforma invoice is a preliminary bill sent before goods ship or work starts. When to use one, what to include, and how it differs from a quote. https://keeninvoice.com/blog/what-is-an-invoice/https://keeninvoice.com/blog/what-is-an-invoice/Sun, 18 Oct 2026 00:00:00 GMTInvoice meaning in plain English: what an invoice is, what it’s for, what goes on one, the main types, and an example invoice you can follow.