diff --git a/inbox.py b/inbox.py
index 0ea654c66..b35498529 100644
--- a/inbox.py
+++ b/inbox.py
@@ -2991,6 +2991,24 @@ def runInboxQueue(recentPostsCache: {}, maxRecentPosts: int,
                                 if unknownFile:
                                     unknownFile.write(unknownContext + '\n')
                                     unknownFile.close()
+                    else:
+                        print('Unrecognized jsonld signature type: ' +
+                              jwebsigType)
+
+                        unknownSignaturesFile = \
+                            baseDir + '/accounts/unknownJsonSignatures.txt'
+
+                        alreadyUnknown = False
+                        if os.path.isfile(unknownSignaturesFile):
+                            if jwebsigType in \
+                               open(unknownSignaturesFile).read():
+                                alreadyUnknown = True
+
+                        if not alreadyUnknown:
+                            unknownFile = open(unknownSignaturesFile, "a+")
+                            if unknownFile:
+                                unknownFile.write(jwebsigType + '\n')
+                                unknownFile.close()
 
         # strict enforcement of json signatures
         if not hasJsonSignature: