GSA FCP Update: Letter of Supply Compliance Is Now SIN-Specific
Effective July 27, 2026, the FAS Catalog Platform (FCP) updated how Letter of Supply (LoS) compliance flags appear in the Compliance & Pricing (C&P) report. Under this update, the LoS compliance flag is now Special Item Number (SIN)-specific. The flag will only appear when the proposed SIN has a Letter of Supply requirement. Items proposed under SINs that do not require an LoS will no longer receive an LoS compliance flag. This change aligns the FCP with the SIN-specific LoS requirements established under MAS Refresh 27.
What Changed?
Previously, FCP could display a “Review LoS Requirement” flag when the GSA Verified Products Portal (VPP) did not have manufacturer authorization information available for an item. The updated process is more targeted.
SINs That Require a Letter of Supply
If an item is proposed under a SIN that requires an LoS and VPP does not have authorization information on file, the C&P report will display: “LoS must be on file.” The vendor must then ensure that an appropriate Letter of Supply is already on file or submit a new LoS through eMod.
SINs That Do Not Require a Letter of Supply
If an item is proposed under a SIN that does not have an LoS requirement, the C&P report will not display an LoS flag. Any available manufacturer or supplier authorization information from VPP may still appear because VPP authorization programs are not limited to individual SINs.
BPA Catalogs
For items included on a BPA catalog, the LoS flag will not appear. The Letter of Supply requirement should be addressed at the MAS contract level. Available VPP authorization information may still be displayed.
When Does the New Logic Apply?
The change applies to C&P files generated on or after July 27, 2026, at approximately 5:00 p.m. ET. Files generated before that date and time will continue to show the previous “Review LoS Requirement” flag. However, if an FCP action is still in progress, the new logic will apply when FCP generates a new file for that action.
Actions in “C&P Report Available, Pending Vendor Upload”
When the vendor uses Quick Update to remove flagged items, FCP generates a new Product File. The regenerated C&P report will use the new SIN-specific LoS logic.
Actions in “Requires Vendor Action (Pending Vendor Upload)”
When the file is submitted from FCP to eMod, FCP automatically recalculates the market research and generates the final file for Contract Specialist/Contracting Officer review. The final Product File deposited into eMod, as well as the final ribbon in FCP, will reflect the updated LoS flag logic.
What Vendors Need to Do
If the C&P report displays the “LoS Must Be on File” flag, the vendor should verify that an appropriate Letter of Supply covering the item is already on file. If no applicable LoS is on file, the vendor will need to submit a new Letter of Supply through eMod. Vendors should also verify the specific LoS requirements applicable to the SIN under which the item is being proposed. No action is required for previously submitted files or completed actions solely because of this FCP update.
Why This Update Matters
The SIN-specific approach makes the FCP compliance review more closely aligned with the actual LoS requirements applicable to each SIN. For vendors, this means that an LoS flag should no longer appear simply because VPP lacks manufacturer authorization information when the proposed SIN does not have an LoS requirement.
The key takeaway is simple:
The presence of an LoS flag now depends on whether the specific SIN requires a Letter of Supply.
Need Assistance?
If the “LoS Must Be on File” flag appears and you are unsure whether a new Letter of Supply is required, GSA recommends contacting the government point of contact assigned to your contract. This information can be found through eLibrary or the FCP Catalog Overview page.
For assistance navigating FCP, vendors can contact [email protected] or attend the
Also Read: New Updates to Photo Processing for MAS Contractors on GSA Advantage
Keeping your MAS catalog compliant in FCP is an ongoing management function, not a one-time setup task. The July 27 LoS flag update adds a new automated enforcement layer that product resellers under Category F and Subcategory A10 must address proactively. Contractors who resolve flagged items quickly will maintain uninterrupted GSA Advantage visibility. Those who do not will find their products invisible to federal buyers until the flag clears.
For MAS contractors who need support resolving FCP compliance flags, managing LoS documentation, or keeping their GSA schedule catalog current and buyer-ready, iQuasar’s GSA MAS services team provides hands-on contract management and catalog compliance support. Contact us today to resolve your FCP issues before they affect your catalog visibility.
