diff --git a/wcs_olap/wcs_api.py b/wcs_olap/wcs_api.py
index 0762ba8..17c2452 100644
--- a/wcs_olap/wcs_api.py
+++ b/wcs_olap/wcs_api.py
@@ -211,6 +211,9 @@ class WcsApi(object):
 
     def get_formdata(self, slug):
         for d in self.get_json(self.forms_url, slug + '/list?anonymise&full=on'):
+            # w.cs. had a bug where some formdata lost their draft status, skip them
+            if not d.get('receipt_time'):
+                continue
             yield FormData(wcs_api=self, **d)
 
     def get_schema(self, slug):