diff --git a/ietf/doc/tests_utils.py b/ietf/doc/tests_utils.py
index 7db59819da..ef71f6ae6e 100644
--- a/ietf/doc/tests_utils.py
+++ b/ietf/doc/tests_utils.py
@@ -13,13 +13,15 @@
 from ietf.group.factories import GroupFactory, RoleFactory
 from ietf.name.models import DocTagName
 from ietf.person.factories import PersonFactory
+from ietf.doc.factories import BallotPositionDocEventFactory
 from ietf.utils.test_utils import TestCase, name_of_file_containing, reload_db_objects
 from ietf.person.models import Person
 from ietf.doc.factories import DocumentFactory, WgRfcFactory, WgDraftFactory
 from ietf.doc.models import State, DocumentActionHolder, DocumentAuthor
 from ietf.doc.utils import (update_action_holders, add_state_change_event, update_documentauthors,
                             fuzzy_find_documents, rebuild_reference_relations, build_file_urls,
-                            ensure_draft_bibxml_path_exists, update_or_create_draft_bibxml_file)
+                            ensure_draft_bibxml_path_exists, update_or_create_draft_bibxml_file,
+                            last_ballot_doc_revision)
 from ietf.utils.draft import Draft, PlaintextDraft
 from ietf.utils.xmldraft import XMLDraft
 
@@ -533,3 +535,27 @@ def test_update_draft_bibxml_file(self, mock):
         self.assertEqual(mock.call_count, 1)
         self.assertEqual(mock.call_args, call(doc, "26"))
         self.assertEqual(ref_path.read_text(), "This\nis\nmy\nbibxml")
+
+
+class LastBallotDocRevisionTests(TestCase):
+    def test_last_ballot_doc_revision(self):
+        now = timezone.now()
+        ad = Person.objects.get(user__username="ad")
+        bpde_with_null_send_email = BallotPositionDocEventFactory(
+            time=now - datetime.timedelta(minutes=30),
+            send_email=None,
+        )
+        ballot = bpde_with_null_send_email.ballot
+        BallotPositionDocEventFactory(
+            ballot=ballot,
+            balloter=ad,
+            pos_id='noobj',
+            comment='Commentary',
+            comment_time=timezone.now(),
+            send_email=None,
+        )
+        doc = bpde_with_null_send_email.doc
+        rev = bpde_with_null_send_email.rev
+        nobody = PersonFactory()
+        self.assertIsNone(last_ballot_doc_revision(doc, nobody))
+        self.assertEqual(rev, last_ballot_doc_revision(doc, ad))
diff --git a/ietf/doc/utils.py b/ietf/doc/utils.py
index 115b28b09b..2bd9a3d314 100644
--- a/ietf/doc/utils.py
+++ b/ietf/doc/utils.py
@@ -36,11 +36,12 @@
 from ietf.doc.models import Document, DocHistory, State, DocumentAuthor, DocHistoryAuthor
 from ietf.doc.models import RelatedDocument, RelatedDocHistory, BallotType, DocReminder
 from ietf.doc.models import DocEvent, ConsensusDocEvent, BallotDocEvent, IRSGBallotDocEvent, NewRevisionDocEvent, StateDocEvent
-from ietf.doc.models import TelechatDocEvent, DocumentActionHolder, EditedAuthorsDocEvent
+from ietf.doc.models import TelechatDocEvent, DocumentActionHolder, EditedAuthorsDocEvent, BallotPositionDocEvent
 from ietf.name.models import DocReminderTypeName, DocRelationshipName
 from ietf.group.models import Role, Group, GroupFeatures
 from ietf.ietfauth.utils import has_role, is_authorized_in_doc_stream, is_individual_draft_author, is_bofreq_editor
 from ietf.person.models import Email, Person
+from ietf.person.utils import get_active_balloters
 from ietf.review.models import ReviewWish
 from ietf.utils import draft, log
 from ietf.utils.mail import parseaddr, send_mail
@@ -687,6 +688,22 @@ def nice_consensus(consensus):
         }
     return mapping[consensus]
 
+def last_ballot_doc_revision(doc, person):
+    """ Return the document revision for the most recent ballot position
+        by the provided user. """
+    ballot = doc.active_ballot()
+    if ballot is None or person is None:
+        return None    
+    balloters = get_active_balloters(ballot.ballot_type)
+    if person not in balloters:
+        return None
+    position_queryset = BallotPositionDocEvent.objects.filter(type="changed_ballot_position", balloter=person, ballot=ballot).order_by("-time")
+    if not position_queryset.exists():
+        return None
+    ballot_time = position_queryset.first().time
+    doc_rev = NewRevisionDocEvent.objects.filter(doc=doc, time__lte=ballot_time).order_by('-time').first().rev
+    return doc_rev
+
 def has_same_ballot(doc, date1, date2=None):
     """ Test if the most recent ballot created before the end of date1
         is the same as the most recent ballot created before the
diff --git a/ietf/doc/views_doc.py b/ietf/doc/views_doc.py
index 4a20db3c89..50070734f9 100644
--- a/ietf/doc/views_doc.py
+++ b/ietf/doc/views_doc.py
@@ -79,6 +79,7 @@
 from ietf.doc.views_ballot import parse_ballot_edit_return_point
 from ietf.doc.forms import InvestigateForm, TelechatForm, NotifyForm, ActionHoldersForm, DocAuthorForm, DocAuthorChangeBasisForm
 from ietf.doc.mails import email_comment, email_remind_action_holders
+from ietf.doc.utils import last_ballot_doc_revision
 from ietf.mailtrigger.utils import gather_relevant_expansions
 from ietf.meeting.models import Session, SessionPresentation
 from ietf.meeting.utils import group_sessions, get_upcoming_manageable_sessions, sort_sessions, add_event_info_to_session_qs
@@ -1225,6 +1226,10 @@ def document_history(request, name):
             request.user, ("Area Director", "Secretariat", "IRTF Chair")
         )
 
+    # if the current user has balloted on this document, give them a revision hint
+    ballot_doc_rev = None
+    if request.user.is_authenticated:
+        ballot_doc_rev = last_ballot_doc_revision(doc, request.user.person)
 
     return render(
         request,
@@ -1235,6 +1240,7 @@ def document_history(request, name):
             "diff_revisions": diff_revisions,
             "events": events,
             "can_add_comment": can_add_comment,
+            "ballot_doc_rev": ballot_doc_rev,
         },
     )
 
diff --git a/ietf/templates/doc/document_history.html b/ietf/templates/doc/document_history.html
index a9ee3e9a36..78471e08d6 100644
--- a/ietf/templates/doc/document_history.html
+++ b/ietf/templates/doc/document_history.html
@@ -20,6 +20,11 @@
         <h2 class="my-3">Revision differences</h2>
         {% include "doc/document_history_form.html" with doc=doc diff_revisions=diff_revisions action=rfcdiff_base_url snapshot=snapshot only %}
     {% endif %}
+    {% if ballot_doc_rev %}
+        <p class="alert alert-info my-3">
+            Your most recent ballot position was provided when the document was at version {{ ballot_doc_rev }}.
+        </p>
+    {% endif %}
     <h2 class="my-3">Document history</h2>
     {% if doc.came_from_draft %}
         <ul class="nav nav-tabs my-3">