diff --git a/app/src/androidTest/java/de/westnordost/streetcomplete/quests/AddPostboxCollectionTimesTest.java b/app/src/androidTest/java/de/westnordost/streetcomplete/quests/AddPostboxCollectionTimesTest.java
index c72f27aa79..d770912ad4 100644
--- a/app/src/androidTest/java/de/westnordost/streetcomplete/quests/AddPostboxCollectionTimesTest.java
+++ b/app/src/androidTest/java/de/westnordost/streetcomplete/quests/AddPostboxCollectionTimesTest.java
@@ -11,7 +11,7 @@ public void testNoTimes()
 	{
 		bundle.putBoolean(AddCollectionTimesForm.NO_TIMES_SPECIFIED, true);
 		verify(
-			new StringMapEntryAdd("note:collection_times","no times specified on the box"));
+			new StringMapEntryAdd("collection_times:signed","no"));
 	}
 
 	public void testTimes()
diff --git a/app/src/main/java/de/westnordost/streetcomplete/quests/opening_hours/AddOpeningHours.java b/app/src/main/java/de/westnordost/streetcomplete/quests/opening_hours/AddOpeningHours.java
index 8cfd3adbf0..d664f3f8a2 100644
--- a/app/src/main/java/de/westnordost/streetcomplete/quests/opening_hours/AddOpeningHours.java
+++ b/app/src/main/java/de/westnordost/streetcomplete/quests/opening_hours/AddOpeningHours.java
@@ -55,7 +55,7 @@ public class AddOpeningHours extends SimpleOverpassQuestType
 				" tourism = information and information = office or" +
 				" leisure ~ " + TextUtils.join("|",leisures) + " or" +
 				" office ~ " + TextUtils.join("|",offices) + ")" +
-				" and !opening_hours and name" +
+				" and !opening_hours and name and opening_hours:signed != no" +
 				" and (access !~ private|no)"; // exclude ones without access to general public
 	}
 
@@ -67,6 +67,11 @@ public class AddOpeningHours extends SimpleOverpassQuestType
 	@Override public void applyAnswerTo(Bundle answer, StringMapChangesBuilder changes)
 	{
 		String openingHours = answer.getString(AddOpeningHoursForm.OPENING_HOURS);
+		if(answer.getBoolean(AddOpeningHoursForm.NO_SIGN))
+		{
+			changes.add("opening_hours:signed", "no");
+			return;
+		}
 		if(openingHours != null)
 		{
 			changes.add("opening_hours", openingHours);
diff --git a/app/src/main/java/de/westnordost/streetcomplete/quests/opening_hours/AddOpeningHoursForm.java b/app/src/main/java/de/westnordost/streetcomplete/quests/opening_hours/AddOpeningHoursForm.java
index 6595b9f449..079565392f 100644
--- a/app/src/main/java/de/westnordost/streetcomplete/quests/opening_hours/AddOpeningHoursForm.java
+++ b/app/src/main/java/de/westnordost/streetcomplete/quests/opening_hours/AddOpeningHoursForm.java
@@ -10,7 +10,6 @@
 import android.view.ViewGroup;
 import android.widget.Button;
 import android.widget.EditText;
-import android.widget.Toast;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -31,6 +30,7 @@
 public class AddOpeningHoursForm extends AbstractQuestFormAnswerFragment
 {
 	public static final String OPENING_HOURS = "opening_hours";
+	public static final String NO_SIGN = "no_sign";
 
 	private static final String	OPENING_HOURS_DATA = "oh_data",
 								IS_ADD_MONTHS_MODE = "oh_add_months";
@@ -84,6 +84,7 @@ private void initOpeningHoursAdapter(View contentView, Bundle savedInstanceState
 
 	private void addOtherAnswers()
 	{
+		addOtherAnswer(R.string.quest_openingHours_no_sign, this::confirmNoSign);
 		addOtherAnswer(R.string.quest_openingHours_answer_no_regular_opening_hours, this::showInputCommentDialog);
 		addOtherAnswer(R.string.quest_openingHours_answer_247, this::showConfirm24_7Dialog);
 		addOtherAnswer(R.string.quest_openingHours_answer_seasonal_opening_hours, this::changeToMonthsMode);
@@ -168,6 +169,20 @@ private void showConfirm24_7Dialog()
 				.show();
 	}
 
+	private void confirmNoSign()
+	{
+		new AlertDialogBuilder(getActivity())
+			.setTitle(R.string.quest_generic_confirmation_title)
+			.setPositiveButton(R.string.quest_generic_confirmation_yes, (dialog, which) ->
+			{
+				Bundle data = new Bundle();
+				data.putBoolean(NO_SIGN, true);
+				applyImmediateAnswer(data);
+			})
+			.setNegativeButton(R.string.quest_generic_confirmation_no, null)
+			.show();
+	}
+
 	private void changeToMonthsMode()
 	{
 		isAlsoAddingMonths = true;
diff --git a/app/src/main/java/de/westnordost/streetcomplete/quests/postbox_collection_times/AddPostboxCollectionTimes.java b/app/src/main/java/de/westnordost/streetcomplete/quests/postbox_collection_times/AddPostboxCollectionTimes.java
index d09b2aedeb..bb60527ab9 100644
--- a/app/src/main/java/de/westnordost/streetcomplete/quests/postbox_collection_times/AddPostboxCollectionTimes.java
+++ b/app/src/main/java/de/westnordost/streetcomplete/quests/postbox_collection_times/AddPostboxCollectionTimes.java
@@ -18,7 +18,7 @@ public class AddPostboxCollectionTimes extends SimpleOverpassQuestType
 
 	@Override protected String getTagFilters()
 	{
-		return "nodes with amenity=post_box and !collection_times and !note:collection_times and (access !~ private|no)";
+		return "nodes with amenity=post_box and !collection_times and collection_times:signed != no and (access !~ private|no)";
 	}
 
 	@Override public AbstractQuestAnswerFragment createForm()
@@ -31,7 +31,7 @@ public class AddPostboxCollectionTimes extends SimpleOverpassQuestType
 		boolean noTimes = answer.getBoolean(AddCollectionTimesForm.NO_TIMES_SPECIFIED);
 		if(noTimes)
 		{
-			changes.add("note:collection_times","no times specified on the box");
+			changes.add("collection_times:signed","no");
 		}
 		else
 		{
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 2d258c0ade..b6ff471773 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -455,6 +455,7 @@ Otherwise, you can download another keyboard in the app store. Popular keyboards
     <string name="invalidate_confirmation">Invalidate</string>
     <string name="invalidation_dialog_message">Invalidating the cache causes the quests to be updated next time they are downloaded. The quest cache is invalidated automatically after one week and immediately when a quest you solved turns out to be already answered by someone else.</string>
     <string name="quest_openingHours_emptyAnswer">You need to describe what is on the sign. If there is no sign, you should ask for the opening hours inside.</string>
+    <string name="quest_openingHours_no_sign">No opening hours sign</string>
     <string name="quest_cycleway_value_none_but_no_oneway">none, but cyclists may use road in both directions</string>
     <string name="quest_generic_looks_like_this">Usually looks like this:</string>
     <string name="quest_surface_value_metal">Metal</string>
@@ -610,7 +611,6 @@ Otherwise, you can download another keyboard in the app store. Popular keyboards
     <string name="quest_address_answer_no_housenumber_message1">The building was tagged as:</string>
     <string name="quest_address_answer_no_housenumber_message2">Is this correct and is it not just part of a building?</string>
     <string name="quest_maxspeed_sign_question">What defines the speed limit?</string>
-
     <string name="notification_channel_download">"Download"</string>
     <string name="quest_playground_access_title">Is this playground publicly accessible?</string>
     <string name="quest_segregated_title">How are the footway and cycleway laid out here?</string>