An invoice is a request for payment, not a proof of payment — that distinction matters. A standard invoice tells the customer what they owe, when it is due, and how to pay. Once they pay, you should issue a receipt (see our receipts category) to confirm the transaction closed. Sending both documents is the bare minimum for a professional business; skipping either one creates friction in collections, accounting, and tax preparation.
The two invoice templates in this category cover the common scenarios. The base invoice template handles one-time services or product sales with quantity, unit price, tax, and total fields. The sponsorship invoice applies the same structure to event sponsorships, where you typically have a flat fee tied to a deliverable (logo placement, signage, mention) and need clear payment terms to enforce collection.
Best practices we bake into both templates: an invoice number, the date issued and date due, a clear "Pay to" address, the customer's billing email, and a note section for purchase order references or special instructions. Send invoices the same day the work is delivered or the product ships. Late invoices create late payments, and a short, professional reminder at 7 and 30 days past due will recover more money than a stern letter at 90.