This page contains documents that are unique for suppliers connecting with REI on Rithum's platform. The documents below have been customized for REI suppliers and should be used during both the onboarding process and when receiving live orders. 

For questions related to the REI drop-ship program, please reach out to your brand's REI merchandising representative. You can also find documentation on the REI drop-ship program at the REI Partner Site.

For onboarding support, please email the Onboarding team at

For production support, check out Rithum’s supplier documentation or reach out to our Software Support team.

Required Fields by Workflow

REI requires certain fields for inventory, order, and invoice updates. You will need to ensure that you are sending all the required fields for this program. To view the required fields, see the document below.

REI - Required Fields by Workflow

REI Drop-ship Program Guidelines

REI has provided documentation on drop-ship program guidelines that can be accessed through their REI Partner Site. You will be able to find details on program SLAs, photography requirements, typical timelines, etc. through that site.

Once on the REI Partner Site, follow this trail to locate the drop-ship program guidelines:

Vendor Guides & Transportation > VIF Vendor Information

Onboarding with Rithum

To learn more about the onboarding process and your next steps, see:

EDI Documentation

If you're going to be exchanging EDI documents with Rithum for REI, then you will be using the standard EDI specifications

Note: In the EDI specifications, there are two versions for the 850 file: version 4010 and 5010. REI requires that you use the 5010 version for 850 files. All other files (846, 856, 870, 810) will use the 4010 version.

REI requires the following EDI documents for the drop-ship program:

  • 846 Inventory Advice
  • 850 Purchase Order (5010v)
  • 856 Advanced Ship Notice (ASN)
  • 870 Order Status (Cancel)
  • 810 Invoice
  • 997 Acknowledgment

Packing Slip Guide

Use the document below to create your in-house packing slip and map fields on order files from the  platform to the packing slip.

REI - Packing Slip Guide

REI Logo

Carrier: UPS

REI uses UPS to fulfill orders. Below are the methods you can expect to receive. You can also see this list and configure your own carrier/service codes on the Mapping Settings page in the web application.

Methods: Ground (UPCG), Standard (UPSS), Surepost (UPSP), Surepost Lightweight (USPL), 2nd Day Air (U2DA), Next Day Air (UNDA), Next Day Air Saver (UNAS)

REI Vendor Inventory Fulfillment (VIF) Label FAQ

VIF Labels FAQ

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