diff --git a/Signal/src/ViewControllers/OWSTableViewController.h b/Signal/src/ViewControllers/OWSTableViewController.h
index db2476363..bb6218b52 100644
--- a/Signal/src/ViewControllers/OWSTableViewController.h
+++ b/Signal/src/ViewControllers/OWSTableViewController.h
@@ -66,6 +66,10 @@ typedef UITableViewCell *_Nonnull (^OWSTableCustomCellBlock)();
 
 + (OWSTableItem *)disclosureItemWithText:(NSString *)text actionBlock:(nullable OWSTableActionBlock)actionBlock;
 
++ (OWSTableItem *)disclosureItemWithText:(NSString *)text
+                         customRowHeight:(CGFloat)customRowHeight
+                             actionBlock:(nullable OWSTableActionBlock)actionBlock;
+
 + (OWSTableItem *)actionItemWithText:(NSString *)text actionBlock:(nullable OWSTableActionBlock)actionBlock;
 
 + (OWSTableItem *)labelItemWithText:(NSString *)text;
diff --git a/Signal/src/ViewControllers/OWSTableViewController.m b/Signal/src/ViewControllers/OWSTableViewController.m
index 9980e2cb6..578071160 100644
--- a/Signal/src/ViewControllers/OWSTableViewController.m
+++ b/Signal/src/ViewControllers/OWSTableViewController.m
@@ -169,6 +169,15 @@ const CGFloat kOWSTable_DefaultCellHeight = 45.f;
     return item;
 }
 
++ (OWSTableItem *)disclosureItemWithText:(NSString *)text
+                         customRowHeight:(CGFloat)customRowHeight
+                             actionBlock:(nullable OWSTableActionBlock)actionBlock
+{
+    OWSTableItem *item = [self disclosureItemWithText:text actionBlock:actionBlock];
+    item.customRowHeight = @(customRowHeight);
+    return item;
+}
+
 + (OWSTableItem *)actionItemWithText:(NSString *)text actionBlock:(nullable OWSTableActionBlock)actionBlock
 {
     OWSAssert(text.length > 0);
diff --git a/Signal/src/ViewControllers/ShowGroupMembersViewController.m b/Signal/src/ViewControllers/ShowGroupMembersViewController.m
index 48a400bf3..44f284cf7 100644
--- a/Signal/src/ViewControllers/ShowGroupMembersViewController.m
+++ b/Signal/src/ViewControllers/ShowGroupMembersViewController.m
@@ -121,6 +121,7 @@ NS_ASSUME_NONNULL_BEGIN
 
     OWSTableContents *contents = [OWSTableContents new];
 
+    __weak ShowGroupMembersViewController *weakSelf = self;
     ContactsViewHelper *helper = self.contactsViewHelper;
 
     OWSTableSection *membersSection = [OWSTableSection new];
@@ -136,6 +137,14 @@ NS_ASSUME_NONNULL_BEGIN
             @"Title for the 'no longer verified' section of the 'group members' view.");
         membersSection.headerTitle = NSLocalizedString(
             @"GROUP_MEMBERS_SECTION_TITLE_MEMBERS", @"Title for the 'members' section of the 'group members' view.");
+        [noLongerVerifiedSection
+            addItem:[OWSTableItem disclosureItemWithText:NSLocalizedString(@"GROUP_MEMBERS_RESET_NO_LONGER_VERIFIED",
+                                                             @"Label for the button that clears all verification "
+                                                             @"errors in the 'group members' view.")
+                                         customRowHeight:ContactTableViewCell.rowHeight
+                                             actionBlock:^{
+                                                 [weakSelf offerResetAllNoLongerVerified];
+                                             }]];
         [self addMembers:noLongerVerifiedRecipientIds toSection:noLongerVerifiedSection useVerifyAction:YES];
         [contents addSection:noLongerVerifiedSection];
     }
@@ -200,6 +209,57 @@ NS_ASSUME_NONNULL_BEGIN
     }
 }
 
+- (void)offerResetAllNoLongerVerified
+{
+    OWSAssert([NSThread isMainThread]);
+
+    UIAlertController *actionSheetController = [UIAlertController
+        alertControllerWithTitle:nil
+                         message:NSLocalizedString(@"GROUP_MEMBERS_RESET_NO_LONGER_VERIFIED_ALERT_MESSAGE",
+                                     @"Label for the 'reset all no-longer-verified group members' confirmation alert.")
+                  preferredStyle:UIAlertControllerStyleAlert];
+
+    __weak ShowGroupMembersViewController *weakSelf = self;
+    UIAlertAction *verifyAction = [UIAlertAction
+        actionWithTitle:NSLocalizedString(@"OK", nil)
+                  style:UIAlertActionStyleDestructive
+                handler:^(UIAlertAction *_Nonnull action) {
+                    [weakSelf resetAllNoLongerVerified];
+                }];
+    [actionSheetController addAction:verifyAction];
+
+    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:NSLocalizedString(@"TXT_CANCEL_TITLE", @"")
+                                                           style:UIAlertActionStyleCancel
+                                                         handler:nil];
+    [actionSheetController addAction:cancelAction];
+
+    [self presentViewController:actionSheetController animated:YES completion:nil];
+}
+
+- (void)resetAllNoLongerVerified
+{
+    OWSAssert([NSThread isMainThread]);
+
+    OWSIdentityManager *identityManger = [OWSIdentityManager sharedManager];
+    NSArray<NSString *> *recipientIds = [self noLongerVerifiedRecipientIds];
+    for (NSString *recipientId in recipientIds) {
+        OWSVerificationState verificationState = [identityManger verificationStateForRecipientId:recipientId];
+        if (verificationState == OWSVerificationStateNoLongerVerified) {
+            NSData *identityKey = [identityManger identityKeyForRecipientId:recipientId];
+            if (identityKey.length < 1) {
+                OWSFail(@"Missing identity key for: %@", recipientId);
+                continue;
+            }
+            [identityManger setVerificationState:OWSVerificationStateDefault
+                                     identityKey:identityKey
+                                     recipientId:recipientId
+                           isUserInitiatedChange:YES];
+        }
+    }
+
+    [self updateTableContents];
+}
+
 // Returns a collection of the group members who are "no longer verified".
 - (NSArray<NSString *> *)noLongerVerifiedRecipientIds
 {
diff --git a/Signal/translations/en.lproj/Localizable.strings b/Signal/translations/en.lproj/Localizable.strings
index 1b32fac93..7b5fb53d6 100644
--- a/Signal/translations/en.lproj/Localizable.strings
+++ b/Signal/translations/en.lproj/Localizable.strings
@@ -580,6 +580,12 @@
 /* Button label for the 'call group member' button */
 "GROUP_MEMBERS_CALL" = "Call";
 
+/* Label for the button that clears all verification errors in the 'group members' view. */
+"GROUP_MEMBERS_RESET_NO_LONGER_VERIFIED" = "Mark All As Not Verified";
+
+/* Label for the 'reset all no-longer-verified group members' confirmation alert. */
+"GROUP_MEMBERS_RESET_NO_LONGER_VERIFIED_ALERT_MESSAGE" = "This will mark all of the group members whose safety numbers have changed since they were last verified as not verified.";
+
 /* Title for the 'members' section of the 'group members' view. */
 "GROUP_MEMBERS_SECTION_TITLE_MEMBERS" = "Members";