diff --git a/doc/release-notes/1.31/2558-productcode-case-insensitive.md b/doc/release-notes/1.31/2558-productcode-case-insensitive.md
new file mode 100644
index 0000000000..5b689c28c3
--- /dev/null
+++ b/doc/release-notes/1.31/2558-productcode-case-insensitive.md
@@ -0,0 +1,5 @@
+## Bug Fixes
+
+### ProductCode matching is case-insensitive for single-package searches
+
+Single-package searches now send ProductCode matches as case-insensitive requests, allowing REST sources to match ProductCode values whose casing differs from the installed ARP value or manifest value.
diff --git a/src/AppInstallerCLICore/Workflows/WorkflowBase.cpp b/src/AppInstallerCLICore/Workflows/WorkflowBase.cpp
index 50f8b0c02b..6b3dcd5eb2 100644
--- a/src/AppInstallerCLICore/Workflows/WorkflowBase.cpp
+++ b/src/AppInstallerCLICore/Workflows/WorkflowBase.cpp
@@ -951,9 +951,10 @@ namespace AppInstaller::CLI::Workflow
         {
             std::string_view query = args.GetArg(Execution::Args::Type::Query);
 
-            // Regardless of match type, always use an exact match for the system reference strings.
+            // Package family names use folded exact matching in the local index. Product codes
+            // must be case-insensitive for REST sources, which may preserve manifest casing.
             searchRequest.Inclusions.emplace_back(PackageMatchFilter(PackageMatchField::PackageFamilyName, MatchType::Exact, query));
-            searchRequest.Inclusions.emplace_back(PackageMatchFilter(PackageMatchField::ProductCode, MatchType::Exact, query));
+            searchRequest.Inclusions.emplace_back(PackageMatchFilter(PackageMatchField::ProductCode, MatchType::CaseInsensitive, query));
             searchRequest.Inclusions.emplace_back(PackageMatchFilter(PackageMatchField::Id, matchType, query));
             searchRequest.Inclusions.emplace_back(PackageMatchFilter(PackageMatchField::Name, matchType, query));
             searchRequest.Inclusions.emplace_back(PackageMatchFilter(PackageMatchField::Moniker, matchType, query));
diff --git a/src/AppInstallerCLITests/SourceFlow.cpp b/src/AppInstallerCLITests/SourceFlow.cpp
index d6f4084c26..7053c3103f 100644
--- a/src/AppInstallerCLITests/SourceFlow.cpp
+++ b/src/AppInstallerCLITests/SourceFlow.cpp
@@ -200,6 +200,25 @@ TEST_CASE("Search_ManifestResolution_BeforeSourcePriority", "[RestSource][Source
     REQUIRE(lookups == 1);
 }
 
+TEST_CASE("SearchRequestForSingle_ProductCodeIsCaseInsensitive", "[workflow]")
+{
+    std::ostringstream output;
+    TestContext context{ output, std::cin };
+    auto previousThreadGlobals = context.SetForCurrentThread();
+    context.Args.AddArg(Execution::Args::Type::Query, "Fiddler2"sv);
+
+    context << GetSearchRequestForSingle;
+
+    const auto& searchRequest = context.Get<Execution::Data::SearchRequest>();
+    auto productCode = std::find_if(searchRequest.Inclusions.begin(), searchRequest.Inclusions.end(), [](const auto& filter)
+    {
+        return filter.Field == PackageMatchField::ProductCode;
+    });
+    REQUIRE(productCode != searchRequest.Inclusions.end());
+    REQUIRE(productCode->Value == "Fiddler2");
+    REQUIRE(productCode->Type == MatchType::CaseInsensitive);
+}
+
 TEST_CASE("SourcePriority_SourceOutput", "[SourcePriority][workflow]")
 {
     GroupPolicyTestOverride policies;