diff --git a/api/src/org/labkey/api/exp/api/ExperimentService.java b/api/src/org/labkey/api/exp/api/ExperimentService.java
index fd0b9fce06f..d122bcafbd4 100644
--- a/api/src/org/labkey/api/exp/api/ExperimentService.java
+++ b/api/src/org/labkey/api/exp/api/ExperimentService.java
@@ -1263,6 +1263,11 @@ List<? extends ExpProtocol> getExpProtocolsWithParameterValue(
     void clearMaterialAncestors(Collection<Long> materialRowIds);
     void repopulateAncestors();
 
+    boolean hasSampleIdsNotInScope(Container container, User user, Collection<Long> sampleIds);
+
+    boolean hasSourceIdsNotInScope(Container container, User user, Collection<Long> sourceIds);
+
+
     class XarExportOptions
     {
         String _lsidRelativizer = LSID_OPTION_FOLDER_RELATIVE;
diff --git a/experiment/src/org/labkey/experiment/api/ExperimentServiceImpl.java b/experiment/src/org/labkey/experiment/api/ExperimentServiceImpl.java
index 3f1c735caab..f7e704b337c 100644
--- a/experiment/src/org/labkey/experiment/api/ExperimentServiceImpl.java
+++ b/experiment/src/org/labkey/experiment/api/ExperimentServiceImpl.java
@@ -969,6 +969,32 @@ public List<Long> findIdsNotPermittedForOperation(List<? extends ExpMaterial> ca
                 .map(ExpObject::getRowId).collect(Collectors.toList());
     }
 
+    @Override
+    public boolean hasSampleIdsNotInScope(Container container, User user, Collection<Long> sampleIds)
+    {
+        return hasEntityIdsNotInScope(container, user, getTinfoMaterial(), sampleIds);
+    }
+
+    @Override
+    public boolean hasSourceIdsNotInScope(Container container, User user, Collection<Long> sourceIds)
+    {
+        return hasEntityIdsNotInScope(container, user, getTinfoData(), sourceIds);
+    }
+
+    // GitHub Issue 1309
+    private boolean hasEntityIdsNotInScope(Container container, User user, TableInfo entityTable, Collection<Long> entityIds)
+    {
+        if (entityIds.isEmpty())
+            return false;
+
+        ContainerFilter cf = container.getProductFoldersDataContainerFilter(user);
+        SimpleFilter filter = new SimpleFilter().addInClause(FieldKey.fromParts("RowId"), entityIds);
+        filter.addClause(cf.createFilterClause(entityTable.getSchema(), FieldKey.fromParts("Container")));
+
+        Set<Long> inScope = new HashSet<>(new TableSelector(entityTable, Collections.singleton("RowId"), filter, null).getArrayList(Long.class));
+        return entityIds.stream().anyMatch(id -> !inScope.contains(id));
+    }
+
     private @NotNull List<Material> getMaterials(SimpleFilter filter, @Nullable Sort sort)
     {
         return new TableSelector(getTinfoMaterial(), filter, sort).getArrayList(Material.class);