The packing slip is the last document your business hands a customer, and it has two jobs in strict order: first operational, telling the unboxer what should be here and what to do if something is wrong, and only then promotional. Sellers get in trouble on both ends, slips that are bare shipping labels reprinted, and inserts that violate the marketplace policies of the box they ride in. The clean setup is one slip standard plus a per-channel insert rule.
The slip itself: the operational floor
Every slip, every channel, carries: order number and date, buyer name, each line item by SKU and title with quantity, and what to do about problems (the return path, a contact route). Two details earn their space:
- SKU-level lines let the buyer and any future you reconcile the box against the order, and they make the pick-check scan and the slip the same truth, a mispick caught at the bench instead of in a refund.
- Multi-shipment honesty: when an order routes to two fulfillment paths, each slip says so (“items 1-2 of 3; the rest ships separately”), the single line that prevents half the where-is-my-stuff messages a split shipment generates.
Prices are optional on a slip (it is not an invoice); gift orders should omit them entirely, and marketplaces flag gift orders for exactly this.
Inserts: where the channel decides
Marketplace orders (Amazon, eBay, Etsy, and kin): conservative by policy, not by taste. The platforms treat the buyer as theirs, and their rules back it: no diverting to your website or socials, no incentives for reviews, no “leave 5 stars and get” of any kind, Amazon’s communication policies are the strictest and enforcement lands as account health damage, with eBay and Etsy in the same spirit. What stays safe and useful in a marketplace box: care and use instructions, sizing help, safety and warranty information, and a neutral thank-you. A quality insert that helps the buyer USE the product reduces returns, the reason codes tell you which help to print, and that is the marketplace-legal win available.
Your own store (Shopify, WooCommerce, OpenCart): the box is your channel. Discount codes for the next order, review requests, social handles, founder notes, packaging as brand, all of it belongs here, and it is a genuine repeat-purchase lever your store-versus-marketplace mix should exploit precisely because marketplaces forbid it on their side.
The operational requirement under the strategy: whoever prints the slip must know the channel. One order queue with channel-aware templates does it automatically; a bench guessing from memory will eventually put the discount card in the Amazon box, the routing layer is also your compliance layer. Fulfillment you do not touch follows the same logic: MCF and 3PL shipments carry whatever standard insert you filed with them, so file per-channel-safe versions.
Common questions
Do marketplaces require a packing slip at all?
Generally no specific document is mandated for standard orders, but the operational floor above protects you regardless, and some fulfillment programs print their own. Never substitute marketing for the operational content.
Can I ask for reviews at all in the box?
Neutral, non-incentivized asks are acceptable on most platforms (“reviews help small shops”) but Amazon reads even neutral asks narrowly, on Amazon orders, use Amazon’s own request tooling and keep the box silent about reviews.
Are QR codes on inserts safe?
They are links wearing squares: a QR to care instructions or warranty registration is fine most places; a QR to your store on a marketplace order is the diversion the policies name. Judge the destination, not the format.
Is a packing slip the same as an invoice?
No, the slip describes contents, the invoice describes money. B2B and cross-border orders often need the real invoice too; keep them separate documents.
Channel-aware down to the box
One order queue, channel-tagged from the source, so every slip and insert matches the rules of the box it ships in, from $49/month with unlimited orders. See pricing.