Effective July 27, 2026, the FAS Catalog Platform (FCP) will update the Letter of Supply (LoS) compliance flag to be Special Item Number (SIN) specific. This means the flag will only show in the Compliance & Pricing (C&P) report when the SIN has an LoS requirement and will no longer show for items that do not require an LoS.
What’s changing:
The LoS flag is now SIN-specific.
Previously, all items received a “Review LoS Requirement” flag when GSA’s Verified Products Portal (VPP) did not have manufacturer authorization data available.
Now, this flag will align with MAS Refresh 27 which made the Letter of Supply requirement SIN-specific:
- If an item is proposed under a SIN that requires a Letter of Supply and VPP does not have authorization data on file, the C&P report will display the flag: “LoS must be on file.”
- If an item is proposed under a SIN that does not require a Letter of Supply, no LoS flag will appear. Any available VPP authorization data will still display because supplier authorization programs are agnostic to SIN.
- If the item is on a BPA catalog, the LoS flag will not show. The Letter of Supply requirement should be addressed at the MAS level. Any available VPP authorization data will still be displayed.
Important! This change applies to newly generated files only:
This update takes effect for C&P files generated on or after July 27, 2026, approximately 5p ET. Files that were already generated before this time will show the previous flag label (“Review LoS Requirement”).
However, if an action is still in progress, then the flag logic will be updated the next time FCP generates a new file for the action. This applies in two situations:
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If the action is in “C&P Report Available, Pending Vendor Upload” status: The FCP will generate a new Product File when Quick Update is used to remove flagged items. The new, regenerated Product File with C&P Report will reflect the new flag logic to display “LoS Must Be on File” only for line items under SINs that have an LoS requirement.
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If the action is in “Requires Vendor Action (Pending Vendor Upload)” status: When the file is submitted from FCP to eMod, FCP automatically re-calculates the market research to generate the final file for CS/CO review. This final Product File with C&P deposits into eMod, as well as the final ribbon in the FCP action. This file will reflect the new flag logic to display “LoS Must Be on File” only for line items under SINs that have an LoS requirement.
No updates are needed to previously submitted files or completed actions.
How to address the LoS flag after July 27, 2026:
If the “LoS Must Be on File” flag displays: This item must have a letter on file that covers the item, or the vendor must submit a new LoS via eMod.
- See more in the FCP LoS FAQ.
- Vendors with questions about whether a new LoS is required should reach out to the contract’s assigned government point of contact. This can be found via eLibrary or FCP “Catalog Overview” page.
Questions?
- For help navigating FCP, please contact vendor.support@gsa.gov
- For help with the LoS requirement, reach out to the contract’s assigned government point of contact. This can be found via eLibrary or FCP “Catalog Overview” page.
Dear Community,
This change appears to be well planned.
Your thoughts, observations, or any questions about this update are more than welcome. We’d be happy to discuss them in the comments.