Not for domestic US shipments. They're best practice, not law. For international shipments, customs authorities often require them alongside a commercial invoice.
Can I use a packing slip as an invoice?
No. Packing slips don't include prices, payment terms, or tax info. You need a separate invoice for accounting and customs purposes.
Should I include prices on my packing slip?
No. Keep prices off packing slips. Many orders are gifts, and recipients shouldn't see what the buyer paid.
Pick and pack is the core fulfillment process: receive inventory, pull each order, pack it, ship it. Here's what it actually looks like — and how to tell if a provider does it well.
If you source overseas and sell on Amazon, your inventory passes through more hands than most sellers expect before it ever reaches a fulfillment center. Two of those hands get confused constantly: the freight forwarder and the 3PL prep center. Here is how the inbound flow actually works.
