diff --git a/misp_modules/lib/cof2misp/cof.py b/misp_modules/lib/cof2misp/cof.py
index 2dfd267..3af0793 100644
--- a/misp_modules/lib/cof2misp/cof.py
+++ b/misp_modules/lib/cof2misp/cof.py
@@ -65,7 +65,7 @@ def is_cof_valid_simple(d: dict) -> bool:
 
 
 
-def validate_cof(d: dict, strict=True) -> bool:
+def validate_cof(d: dict, strict=False) -> bool:
     """Validate an input passive DNS COF (given as dict).
     strict might be set to False in order to loosen the checking.
     With strict==True, a full JSON Schema validation will happen.
diff --git a/misp_modules/modules/import_mod/cof2misp.py b/misp_modules/modules/import_mod/cof2misp.py
index 27efe55..6b9c69f 100755
--- a/misp_modules/modules/import_mod/cof2misp.py
+++ b/misp_modules/modules/import_mod/cof2misp.py
@@ -15,9 +15,10 @@ import base64
 import pprint
 import ndjson
 
-from pymisp import MISPObject, MISPEvent, PyMISP
+# from pymisp import MISPObject, MISPEvent, PyMISP
+from pymisp import MISPObject
 
-from cof2misp.cof import is_valid_ip, validate_cof
+from cof2misp.cof import validate_cof
 
 
 misperrors = {'error': 'Error'}
@@ -58,19 +59,17 @@ def parse_and_insert_cof(data: str) -> dict:
     objects = []
     try:
         entries = ndjson.loads(data)
-        # pprint.pprint(entries)
         for l in entries:           # iterate over all ndjson lines
 
             # validate here (simple validation or full JSON Schema validation)
-            # FIXME
-
+            if not validate_cof(l):
+                return {"error": "Could not validate the COF input '%r'" % l}
 
             # Next, extract some fields
             rrtype = l['rrtype'].upper()
             rrname = l['rrname'].rstrip('.')
             rdata = [x.rstrip('.') for x in l['rdata']]
 
-
             # create a new MISP object, based on the passive-dns object for each nd-JSON line
             o = MISPObject(name='passive-dns', standalone=False, comment='created by cof2misp')
 
@@ -143,7 +142,6 @@ def parse_and_insert_dnsdbflex(data: str):
     pass            # XXX FIXME: need a MISP object for dnsdbflex
 
 
-
 def is_dnsdbflex(data: str) -> bool:
     """Check if the supplied data conforms to the dnsdbflex output (which only contains rrname and rrtype)
 
@@ -163,12 +161,11 @@ def is_dnsdbflex(data: str) -> bool:
     try:
         j = ndjson.loads(data)
         for l in j:
-            if not set(l.keys()) == { 'rrname' , 'rrtype' }:
+            if not set(l.keys()) == {'rrname', 'rrtype'}:
                 return False            # shortcut
         return True
     except Exception as _ex:
         return False
-        
 
 
 def is_cof(data: str) -> bool:
@@ -178,7 +175,7 @@ def is_cof(data: str) -> bool:
 def handler(q=False):
     if q is False:
         return False
-    r = {'results': []}
+
     request = json.loads(q)
     # Parse the json, determine which type of JSON it is (dnsdbflex or COF?)
     # Validate it
@@ -201,7 +198,7 @@ def handler(q=False):
             return {'error': 'Could not find any valid COF input nor dnsdbflex input. Please have a loot at: https://datatracker.ietf.org/doc/draft-dulaunoy-dnsop-passive-dns-cof/'}
     except Exception as ex:
         print("oops, got exception %s" % str(ex))
-        return {'error': "Got exception %s" % str(ex) }
+        return {'error': "Got exception %s" % str(ex)}
 
 
 def introspection():