diff --git a/src/ifcpatch/ifcpatch/recipes/RegenerateGlobalIds.py b/src/ifcpatch/ifcpatch/recipes/RegenerateGlobalIds.py
new file mode 100644
index 0000000000..67cd3af170
--- /dev/null
+++ b/src/ifcpatch/ifcpatch/recipes/RegenerateGlobalIds.py
@@ -0,0 +1,27 @@
+import ifcopenshell
+
+
+class Patcher:
+    def __init__(self, src, file, logger, args=None):
+        self.src = src
+        self.file = file
+        self.logger = logger
+        self.args = args
+
+    def patch(self):
+        if self.args and self.args[0] == "DUPLICATE":
+            guids = set()
+            for element in self.file.by_type("IfcRoot"):
+                if element.GlobalId in guids:
+                    element.GlobalId = ifcopenshell.guid.new()
+                elif len(element.GlobalId) != 22 or element.GlobalId[0] not in "0123":
+                    element.GlobalId = ifcopenshell.guid.new()
+                else:
+                    try:
+                        ifcopenshell.guid.expand(element.GlobalId)
+                    except:
+                        element.GlobalId = ifcopenshell.guid.new()
+                guids.add(element.GlobalId)
+        else:
+            for element in self.file.by_type("IfcRoot"):
+                element.GlobalId = ifcopenshell.guid.new()