diff --git a/data/core.yaml b/data/core.yaml
index 6e046f93d..ea179364e 100644
--- a/data/core.yaml
+++ b/data/core.yaml
@@ -1943,6 +1943,9 @@ en:
       tag_as_disconnected:
         title: Tag as disconnected
         annotation: Tagged very close features as disconnected.
+      tag_as_not:
+        title: "Tag as not the same \"{name}\""
+        annotation: "Added not: tag"
       tag_as_unsquare:
         title: Tag as physically unsquare
         annotation: Tagged a way as having unsquare corners.
diff --git a/modules/services/nsi.js b/modules/services/nsi.js
index d3094ef29..af7c4162a 100644
--- a/modules/services/nsi.js
+++ b/modules/services/nsi.js
@@ -399,7 +399,11 @@ function gatherTuples(tryKVs, tryNames) {
 //   `tags`: `Object` containing the feature's OSM tags
 //   `loc`: Location where this feature exists, as a [lon, lat]
 // Returns
-//   `Object`: The tags the the feature should have, or `null` if no changes needed
+//   `Object` containing the result, or `null` if no changes needed:
+//   {
+//     'newTags': `Object` - The tags the the feature should have
+//     'matched': `Object` - The matched item
+//   }
 //
 function _upgradeTags(tags, loc) {
   let newTags = Object.assign({}, tags);  // shallow copy
@@ -438,7 +442,9 @@ function _upgradeTags(tags, loc) {
 
   // Gather key/value tag pairs to try to match
   const tryKVs = gatherKVs(tags);
-  if (!tryKVs.primary.size && !tryKVs.alternate.size)  return changed ? newTags : null;
+  if (!tryKVs.primary.size && !tryKVs.alternate.size) {
+    return changed ? { newTags: newTags, matched: null } : null;
+  }
 
   // Gather namelike tag values to try to match
   const tryNames = gatherNames(tags);
@@ -448,7 +454,9 @@ function _upgradeTags(tags, loc) {
   const foundQID = _nsi.qids.get(tags.wikidata) || _nsi.qids.get(tags.wikipedia);
   if (foundQID) tryNames.primary.add(foundQID);  // matcher will recognize the Wikidata QID as name too
 
-  if (!tryNames.primary.size && !tryNames.alternate.size)  return changed ? newTags : null;
+  if (!tryNames.primary.size && !tryNames.alternate.size) {
+    return changed ? { newTags: newTags, matched: null } : null;
+  }
 
   // Order the [key,value,name] tuples - test primary before alternate
   const tuples = gatherTuples(tryKVs, tryNames);
@@ -489,6 +497,7 @@ function _upgradeTags(tags, loc) {
     if (!item) continue;
 
     // At this point we have matched a canonical item and can suggest tag upgrades..
+    item = JSON.parse(JSON.stringify(item));   // deep copy
     const tkv = item.tkv;
     const parts = tkv.split('/', 3);     // tkv = "tree/key/value"
     const k = parts[1];
@@ -579,10 +588,10 @@ function _upgradeTags(tags, loc) {
       }
     }
 
-    return newTags;
+    return { newTags: newTags, matched: item };
   }
 
-  return changed ? newTags : null;
+  return changed ? { newTags: newTags, matched: null } : null;
 }
 
 
@@ -682,7 +691,11 @@ export default {
   //   `tags`: `Object` containing the feature's OSM tags
   //   `loc`: Location where this feature exists, as a [lon, lat]
   // Returns
-  //   `Object`: The tags the the feature should have, or `null` if no change
+  //   `Object` containing the result, or `null` if no changes needed:
+  //   {
+  //     'newTags': `Object` - The tags the the feature should have
+  //     'matched': `Object` - The matched item
+  //   }
   //
   upgradeTags: (tags, loc) => _upgradeTags(tags, loc),
 
diff --git a/modules/validations/outdated_tags.js b/modules/validations/outdated_tags.js
index 2116cc262..430e6bd16 100644
--- a/modules/validations/outdated_tags.js
+++ b/modules/validations/outdated_tags.js
@@ -66,13 +66,14 @@ export function validationOutdatedTags() {
     // Attempt to match a canonical record in the name-suggestion-index.
     const nsi = services.nsi;
     let waitingForNsi = false;
+    let nsiResult;
     if (nsi) {
       waitingForNsi = (nsi.status() === 'loading');
       if (!waitingForNsi) {
         const loc = entity.extent(graph).center();
-        const result = nsi.upgradeTags(newTags, loc);
-        if (result) {
-          newTags = result;
+        nsiResult = nsi.upgradeTags(newTags, loc);
+        if (nsiResult) {
+          newTags = nsiResult.newTags;
           subtype = 'noncanonical_brand';
         }
       }
@@ -88,7 +89,7 @@ export function validationOutdatedTags() {
     const isOnlyAddingTags = tagDiff.every(d => d.type === '+');
 
     let prefix = '';
-    if (subtype === 'noncanonical_brand') {
+    if (nsiResult) {
       prefix = 'noncanonical_brand.';
     } else if (subtype === 'deprecated_tags' && isOnlyAddingTags) {
       subtype = 'incomplete_tags';
@@ -107,7 +108,7 @@ export function validationOutdatedTags() {
       entityIds: [entity.id],
       hash: utilHashcode(JSON.stringify(tagDiff)),
       dynamicFixes: () => {
-        return [
+        let fixes = [
           new validationIssueFix({
             autoArgs: autoArgs,
             title: t.html('issues.fix.upgrade_tags.title'),
@@ -116,6 +117,20 @@ export function validationOutdatedTags() {
             }
           })
         ];
+
+        const item = nsiResult && nsiResult.matched;
+        if (item) {
+          fixes.push(
+            new validationIssueFix({
+              title: t.html('issues.fix.tag_as_not.title', { name: item.displayName }),
+              onClick: (context) => {
+                context.perform(addNotTag, t('issues.fix.tag_as_not.annotation'));
+              }
+            })
+          );
+        }
+        return fixes;
+
       }
     }));
     return issues;
@@ -138,6 +153,29 @@ export function validationOutdatedTags() {
     }
 
 
+    function addNotTag(graph) {
+      const currEntity = graph.hasEntity(entity.id);
+      if (!currEntity) return graph;
+
+      const item = nsiResult && nsiResult.matched;
+      if (!item) return graph;
+
+      let newTags = Object.assign({}, currEntity.tags);  // shallow copy
+      const wd = item.mainTag;     // e.g. `brand:wikidata`
+      const notwd = `not:${wd}`;   // e.g. `not:brand:wikidata`
+      const qid = item.tags[wd];
+      newTags[notwd] = qid;
+
+      if (newTags[wd] === qid) {   // if `brand:wikidata` was set to that qid
+        const wp = item.mainTag.replace('wikidata', 'wikipedia');
+        delete newTags[wd];        // remove `brand:wikidata`
+        delete newTags[wp];        // remove `brand:wikipedia`
+      }
+
+      return actionChangeTags(currEntity.id, newTags)(graph);
+    }
+
+
     function showMessage(context) {
       const currEntity = context.hasEntity(entity.id);
       if (!currEntity) return '';