Buying Colissimo postage: online beats the counter
The standard way to pay for a Colissimo shipment is laposte.fr or the La Poste app: enter the addresses, pay by card, and either print the label at home or take the QR code to any post office, where the counter prints it for you. Online pricing sits below counter pricing, and the tracking number attaches to the shipment immediately — the bureau visit becomes a ten-second drop-off instead of a queue with a form.
Our generator complements that flow for the situations where you're not buying La Poste postage at all: preparing an address layout before committing, producing return-address slips for the inside of the box, or formatting labels for shipments where the postage runs through a business account or a marketplace's own system.
Prêt-à-Envoyer: the prepaid box shortcut
For predictable shipments, La Poste sells Colissimo Prêt-à-Envoyer — packaging with the postage already included. Buy the box or pouch, address it, and drop it off; no weighing, no per-shipment purchase. Sellers with a steady flow of same-size orders keep a stack on the shelf and cut fulfilment to a stuff-and-seal routine.
The economics work best when your product genuinely fits the format: the price includes national delivery regardless of weight within the packaging's limit, so dense items extract the most value. For oddly-shaped or highly variable shipments, standard label-plus-postage remains cheaper.
Shipping to overseas France: DOM-TOM is not quite domestic
Colissimo serves Guadeloupe, Martinique, Réunion, French Guiana, Mayotte, and the overseas collectivities, but treat these lanes as their own category: transit runs several days to a couple of weeks depending on the territory, pricing is higher than metropolitan France, and — the detail that surprises senders — shipments to most overseas territories require a customs declaration (CN23), because they sit outside the EU's fiscal territory even though they're France.
Describe contents specifically and value them honestly on the declaration; 'personal effects' with no value is the classic recipe for a parcel stuck at the destination's customs office with the recipient paying octroi de mer import charges plus storage.
⚠️ DOM-TOM shipments need a CN23 customs declaration despite being domestic France on paper. Skipping it is the most common cause of overseas parcels being held or returned.
Letterbox delivery: Colissimo's quiet superpower
For small parcels, La Poste offers letterbox-format Colissimo delivery: if the package fits standard French letterbox dimensions, the facteur delivers it directly into the recipient's boîte aux lettres — no signature, no missed-delivery slip, no relay pickup trip. For e-commerce sellers of small goods, designing packaging to letterbox dimensions measurably improves first-attempt delivery success.
The trade-off is the lack of signature: for higher-value goods, stick with the signed home-delivery variant so proof of receipt exists if a dispute arises. Value-based routing — letterbox format below a threshold, signature above it — is the pattern French e-commerce has broadly converged on.
Below the parcel: Lettre Suivie and the letter-format economy
La Poste's letter products cover a band of shipments that parcel pricing wastes money on. Lettre Suivie — the tracked letter — carries flat, light goods (trading cards, jewelry, phone cases, documents with value) at letter-adjacent rates with a tracking number the buyer can follow. Below it, the ordinary lettre verte handles correspondence and truly low-stakes flat items; above it, the Colissimo world begins.
For sellers of small flat goods, the format decision is the margin decision: an item that ships as a tracked letter instead of a small parcel saves meaningfully on every single order. The discipline is thickness and rigidity — letter formats have physical limits, and a lumpy envelope that gets reclassified mid-network arrives late with postage due. Flatten honestly, measure once, and let the letter economy work.