There are twelve document types in this product, and most businesses will never touch all of them. That’s fine. Nobody should be filing paperwork because software offers it.
But four of them come up constantly, they get confused with each other, and the confusion is expensive in a specific way: it shows up weeks later as an argument about what was agreed.
The quote says what it would cost
An offer. Nothing has happened yet, nothing is owed, and the customer can walk away.
The only thing that matters here is that the numbers are the ones you’d actually honor. A quote built from your product catalog carries that customer’s price list, currency and language already applied, which is the difference between quoting your agreed price and quoting the price you remembered.
Freelancers and small service businesses often need nothing past the invoice. The other two start mattering once you carry stock, or once there’s a gap between agreeing and delivering.
The order confirmation says what was agreed
This is the one people skip, and it’s the one that settles disputes.
A quote is an offer. Once they’ve accepted it, the offer has become an agreement, and the agreement is worth writing down separately, because the two documents can differ. They accepted three of the five lines. They wanted delivery two weeks later. The price moved because the quantity did.
The gap between “yes, go ahead” on a phone call and an invoice arriving six weeks later is where almost every supply argument lives. An order confirmation closes it.
It earns its place when there’s a delay between agreeing and delivering. If you quote and invoice on the same day, skip it.
The packing slip says what’s in the box
Different job, different reader. Whoever opens the carton checks the packing slip. Whoever settles the account reads the invoice. They usually list the same things, and they answer to different people.
Whether it shows prices is a layout decision and the layout is yours. Plenty of businesses ship a slip with quantities and no money on it, which is the usual answer when the person receiving the goods isn’t the person paying.
The product calls this a packing note. Same document, and packing slip is the more common name in the US.
The invoice says what to pay
And it’s the one you can’t take back. Once you finalize it, it has a number your customer can quote at you and the bookkeeping behind it is already done. Getting it wrong is not a disaster, but the fix is a second document rather than a quiet edit - here’s why that’s the better answer.
Don’t type anything twice
Each document should be made from the one before it, not from a blank form.
Say yes to a quote and it turns into whichever of the other three you need next. Nobody opens a blank form and types the prices in again, and it works backwards too, for the customer who changes their mind halfway through.
That isn’t a convenience feature. It’s what stops the price on the invoice quietly differing from the price on the quote, and it’s why “did we agree that?” has an answer rather than a search through somebody’s sent items.
The one that’s genuinely worth understanding is the last conversion. When the invoice is finalized, the journal is already written, the customer’s balance has moved, and the sales tax is sitting in the right box on your return. The document chain and the books aren’t two systems keeping notes on each other.
Where to go next
- Quotes, if you’re still deciding whether the job is worth doing.
- Order confirmations, if the gap between agreeing and delivering is where things go wrong for you.
- Packing slips, if you ship goods.
The reference for all of it, including the eight document types this post ignored, is the guide page: Invoicing and documents.