diff --git a/client/src/app/site/assignments/components/assignment-poll-detail/assignment-poll-detail.component.ts b/client/src/app/site/assignments/components/assignment-poll-detail/assignment-poll-detail.component.ts
index 1eccb316b..954f1b0a1 100644
--- a/client/src/app/site/assignments/components/assignment-poll-detail/assignment-poll-detail.component.ts
+++ b/client/src/app/site/assignments/components/assignment-poll-detail/assignment-poll-detail.component.ts
@@ -50,7 +50,6 @@ export class AssignmentPollDetailComponent extends BasePollDetailComponent<ViewA
     }
 
     protected createVotesData(): void {
-        const votes = {};
         const definitions: PblColumnDefinition[] = [
             {
                 prop: 'user',
@@ -66,35 +65,45 @@ export class AssignmentPollDetailComponent extends BasePollDetailComponent<ViewA
             }
         ];
 
+        const votes = {};
+        let isPseudoanonymized = true;
         for (const option of this.poll.options) {
             for (const vote of option.votes) {
                 const userId = vote.user_id;
-                if (!votes[userId]) {
-                    votes[userId] = {
-                        user: vote.user,
-                        votes: []
-                    };
-                }
+                if (userId) {
+                    isPseudoanonymized = false;
+                    if (!votes[userId]) {
+                        votes[userId] = {
+                            user: vote.user,
+                            votes: []
+                        };
+                    }
 
-                if (vote.weight > 0) {
-                    if (this.poll.isMethodY) {
-                        if (vote.value === 'Y') {
-                            votes[userId].votes.push(option.user.getFullName());
+                    if (vote.weight > 0) {
+                        if (this.poll.isMethodY) {
+                            if (vote.value === 'Y') {
+                                votes[userId].votes.push(option.user.getFullName());
+                            } else {
+                                votes[userId].votes.push(this.voteValueToLabel(vote.value));
+                            }
                         } else {
-                            votes[userId].votes.push(this.voteValueToLabel(vote.value));
+                            votes[userId].votes.push(
+                                `${option.user.getShortName()}: ${this.voteValueToLabel(vote.value)}`
+                            );
                         }
-                    } else {
-                        votes[userId].votes.push(`${option.user.getShortName()}: ${this.voteValueToLabel(vote.value)}`);
                     }
                 }
             }
         }
-        for (const user of this.poll.voted) {
-            if (!votes[user.id]) {
-                votes[user.id] = {
-                    user: user,
-                    votes: [this.translate.instant('empty vote')]
-                };
+        // if the poll was not pseudoanonymized, add all other users as empty votes
+        if (!isPseudoanonymized) {
+            for (const user of this.poll.voted) {
+                if (!votes[user.id]) {
+                    votes[user.id] = {
+                        user: user,
+                        votes: [this.translate.instant('empty vote')]
+                    };
+                }
             }
         }
 
diff --git a/openslides/poll/views.py b/openslides/poll/views.py
index 258544197..1ca2c6c1d 100644
--- a/openslides/poll/views.py
+++ b/openslides/poll/views.py
@@ -167,7 +167,7 @@ class BasePollViewSet(ModelViewSet):
 
         if poll.state not in (BasePoll.STATE_FINISHED, BasePoll.STATE_PUBLISHED):
             raise ValidationError(
-                {"detail": "Pseudoanonmizing can only be done after a finished poll"}
+                {"detail": "Pseudoanonymizing can only be done after finishing a poll"}
             )
         if poll.type != BasePoll.TYPE_NAMED:
             raise ValidationError(
diff --git a/tests/integration/assignments/test_polls.py b/tests/integration/assignments/test_polls.py
index f2116ddec..78f944cba 100644
--- a/tests/integration/assignments/test_polls.py
+++ b/tests/integration/assignments/test_polls.py
@@ -2191,3 +2191,74 @@ class VoteAssignmentPollPseudoanonymousAutoupdates(
                     },
                 },
             )
+
+
+class PseudoanonymizeAssignmentPoll(TestCase):
+    def advancedSetUp(self):
+        self.assignment = Assignment.objects.create(
+            title="test_assignment_QLydMOqkyOHG68yZFJxl", open_posts=1
+        )
+        self.assignment.add_candidate(self.admin)
+        self.poll = AssignmentPoll.objects.create(
+            assignment=self.assignment,
+            title="test_title_3LbUCNirKirpJhRHRxzW",
+            pollmethod=AssignmentPoll.POLLMETHOD_YNA,
+            type=BasePoll.TYPE_NAMED,
+            state=AssignmentPoll.STATE_FINISHED,
+        )
+        self.poll.groups.add(GROUP_ADMIN_PK)
+        self.poll.create_options()
+
+        self.option = self.poll.options.get()
+        self.user1, _ = self.create_user()
+        self.vote1 = AssignmentVote.objects.create(
+            user=self.user1, option=self.option, value="Y", weight=Decimal(1)
+        )
+        self.poll.voted.add(self.user1)
+        self.user2, _ = self.create_user()
+        self.vote2 = AssignmentVote.objects.create(
+            user=self.user2, option=self.option, value="N", weight=Decimal(1)
+        )
+        self.poll.voted.add(self.user2)
+
+    def test_pseudoanonymize_poll(self):
+        response = self.client.post(
+            reverse("assignmentpoll-pseudoanonymize", args=[self.poll.pk])
+        )
+        self.assertHttpStatusVerbose(response, status.HTTP_200_OK)
+        poll = AssignmentPoll.objects.get()
+        self.assertEqual(poll.get_votes().count(), 2)
+        self.assertEqual(poll.amount_users_voted(), 2)
+        self.assertEqual(poll.votesvalid, Decimal("2"))
+        self.assertEqual(poll.votesinvalid, Decimal("0"))
+        self.assertEqual(poll.votescast, Decimal("2"))
+        option = poll.options.get()
+        self.assertEqual(option.yes, Decimal("1"))
+        self.assertEqual(option.no, Decimal("1"))
+        self.assertEqual(option.abstain, Decimal("0"))
+        self.assertTrue(self.user1 in poll.voted.all())
+        self.assertTrue(self.user2 in poll.voted.all())
+        for vote in poll.get_votes().all():
+            self.assertTrue(vote.user is None)
+
+    def test_pseudoanonymize_wrong_state(self):
+        self.poll.state = AssignmentPoll.STATE_CREATED
+        self.poll.save()
+        response = self.client.post(
+            reverse("assignmentpoll-pseudoanonymize", args=[self.poll.pk])
+        )
+        self.assertHttpStatusVerbose(response, status.HTTP_400_BAD_REQUEST)
+        poll = AssignmentPoll.objects.get()
+        self.assertTrue(poll.get_votes().filter(user=self.user1).exists())
+        self.assertTrue(poll.get_votes().filter(user=self.user2).exists())
+
+    def test_pseudoanonymize_wrong_type(self):
+        self.poll.type = AssignmentPoll.TYPE_ANALOG
+        self.poll.save()
+        response = self.client.post(
+            reverse("assignmentpoll-pseudoanonymize", args=[self.poll.pk])
+        )
+        self.assertHttpStatusVerbose(response, status.HTTP_400_BAD_REQUEST)
+        poll = AssignmentPoll.objects.get()
+        self.assertTrue(poll.get_votes().filter(user=self.user1).exists())
+        self.assertTrue(poll.get_votes().filter(user=self.user2).exists())