Macy’s 2026 ASN change: the shipping handoff wholesale suppliers should check

A routing detail now belongs in the ASN

Macy’s introduced a requirement effective February 1, 2026: vendors must include the Trip ID, also called the Authorization Number, in the advance ship notice. Its notice excludes Vendor Direct Fulfillment shipments. For wholesale suppliers, this is a useful example of how a small change can affect the connection between shipping and EDI.

The number comes from Macy’s Routing Notification email. That matters because the person receiving the routing notification may not be the person preparing the ASN. A correct number in someone’s inbox does not automatically become a correct number in the shipment document.

The risk is often between teams

Consider a typical wholesale shipment: the warehouse finishes packing, the traffic team coordinates routing, and the EDI team prepares the shipment notice. Each team can complete its own task while one essential detail fails to reach the next person.

Someone needs responsibility for collecting the final shipping information, checking it against the order and routing details, and getting the approved information into the outgoing document.

For a brand shipping many cartons across multiple orders, relying on a last-minute forwarded email creates an unnecessary point of failure.

Check the handoff before the next shipment

Start with the actual routing notification for an upcoming shipment. Establish who receives it, who checks it and how its information reaches the team handling the ASN. The goal is a repeatable handoff.

• Make sure the shipping contact and the EDI contact are working from the same shipment information.
• Identify who communicates changes after the initial packing details have been sent.
• Keep the routing information tied to the relevant shipment.
• Confirm that the final ASN uses the information approved for that shipment.

These are operational checks, not a substitute for current retailer instructions. Your shipment’s routing and timing requirements still determine what must happen and when.

A ship date is not the whole deadline

A calendar date on a purchase order is only one part of the process. Packing details must be ready, routing information must be available, and the people preparing the documents need time to resolve discrepancies.

Work backward from the shipment’s required milestones. If the warehouse changes the carton count or contents, the EDI team needs that change before the shipment information is finalized. Sending an earlier version faster does not solve a mismatch.

An internal cutoff can help your teams leave room for review. It should be based on the actual retailer requirements and warehouse operation; there is no single cutoff that works for every retailer or shipment.

What a managed EDI service should handle

A wholesale supplier needs more than an account that can transmit a file. The daily work includes receiving the relevant information, preparing the documents, checking the relationships between the order and shipment, and following up when something does not match.

Roundhouse handles that EDI work for wholesale suppliers, including Macy’s orders. We prepare ASNs and shipping labels using the shipment details your team provides and work with you to keep the document handoff organized.

If a retailer requirement has changed, check whether the information reaches the people processing your next order. Contact Roundhouse to discuss your Macy’s EDI processing.