Order routing is the logic that decides which fulfillment location or supplier receives an order once checkout completes. With one warehouse it is a straight hand-off; with several sources it becomes a rule set weighing stock, distance, and cost.
Rules, and the orders that break them
The routing rule most brands start with is the only one they need: everything goes to one place. It stays correct until the day something is out of stock at that place, and then the rule has to answer a second question, which is whether to hold the order, split it, or send it somewhere else. Answer that in advance and it is a configuration. Answer it at 6pm on a Friday and it is an outage.
Split shipments are where routing quietly costs money. An order with two items sourced from two locations pays postage twice, and the customer gets two tracking numbers for one purchase and assumes the second one is a duplicate. If you are going to allow splits, say so on the order confirmation.
Routing also decides what your store is allowed to promise. A storefront that shows live stock from the fulfillment side can refuse an order it cannot fill; one that does not will happily sell a unit that is not there. The migration guide covers wiring the store to the fulfillment side so those two agree.
Related terms
Per-vial pricing, no pack fees, shipped blind under your brand
Product at wholesale, $1 per vial to label it, postage at carrier cost, weekly invoicing on net-7. No setup fees, no monthly minimums, no minimum order quantities.
See the full pricing More definitions in the peptide fulfillment glossary, or read what peptide dropshipping is. FOR RESEARCH USE ONLY — NOT FOR HUMAN OR ANIMAL USE