diff --git a/database_reports/duplicate_indexes.js b/database_reports/duplicate_indexes.js
new file mode 100644
index 0000000000..0e7c0905ee
--- /dev/null
+++ b/database_reports/duplicate_indexes.js
@@ -0,0 +1,14 @@
+db.users.aggregate([
+  { $group: {
+//    _id: { "auth.local.username": "$auth.local.username" },
+//    _id: { "auth.facebook.id": "$auth.facebook.id" },
+    _id: { "auth.local.email": "$auth.local.email" },
+    uniqueIds: { $addToSet: "$_id" },
+    count: { $sum: 1 }
+  }},
+  { $match: {
+    count: { $gt: 1 }
+  }}
+]).forEach(function(user){
+  // handle duplicates. likely, delete the accounts with older lastCron, or with the starter tasks.
+})
\ No newline at end of file