diff --git a/client/css/post-upload.styl b/client/css/post-upload.styl
index aa36e0a..3836293 100644
--- a/client/css/post-upload.styl
+++ b/client/css/post-upload.styl
@@ -13,8 +13,10 @@ $cancel-button-color = tomato
 
         &.inactive input[type=submit],
         &.inactive .skip-duplicates
+        &.inactive .always-upload-similar
         &.uploading input[type=submit],
         &.uploading .skip-duplicates,
+        &.uploading .always-upload-similar
         &:not(.uploading) .cancel
             display: none
 
@@ -39,6 +41,9 @@ $cancel-button-color = tomato
     .skip-duplicates
         margin-left: 1em
 
+    .always-upload-similar
+        margin-left: 1em
+
     form>.messages
         margin-top: 1em
 
diff --git a/client/html/post_upload.tpl b/client/html/post_upload.tpl
index f1ed88f..6374fe8 100644
--- a/client/html/post_upload.tpl
+++ b/client/html/post_upload.tpl
@@ -13,6 +13,14 @@
                 }) %>
             </span>
 
+            <span class='always-upload-similar'>
+                <%= ctx.makeCheckbox({
+                    text: 'Always upload similar',
+                    name: 'always-upload-similar',
+                    checked: false,
+                }) %>
+            </span>
+
             <input type='button' value='Cancel' class='cancel'/>
         </div>
 
diff --git a/client/js/controllers/post_upload_controller.js b/client/js/controllers/post_upload_controller.js
index d317be5..a54baec 100644
--- a/client/js/controllers/post_upload_controller.js
+++ b/client/js/controllers/post_upload_controller.js
@@ -12,7 +12,7 @@ const PostUploadView = require("../views/post_upload_view.js");
 const EmptyView = require("../views/empty_view.js");
 
 const genericErrorMessage =
-    "One of the posts needs your attention; " +
+    "One or more posts needs your attention; " +
     'click "resume upload" when you\'re ready.';
 
 class PostUploadController {
@@ -55,6 +55,7 @@ class PostUploadController {
     _evtSubmit(e) {
         this._view.disableForm();
         this._view.clearMessages();
+        let anyFailures = false;
 
         e.detail.uploadables
             .reduce(
@@ -62,44 +63,51 @@ class PostUploadController {
                     promise.then(() =>
                         this._uploadSinglePost(
                             uploadable,
-                            e.detail.skipDuplicates
-                        )
+                            e.detail.skipDuplicates,
+                            e.detail.alwaysUploadSimilar
+                        ).catch((error) => {
+                            anyFailures = true;
+                            if (error.uploadable) {
+                                if (error.similarPosts) {
+                                    error.uploadable.lookalikes =
+                                        error.similarPosts;
+                                    this._view.updateUploadable(
+                                        error.uploadable
+                                    );
+                                    this._view.showInfo(
+                                        error.message,
+                                        error.uploadable
+                                    );
+                                } else {
+                                    this._view.showError(
+                                        error.message,
+                                        error.uploadable
+                                    );
+                                }
+                            } else {
+                                this._view.showError(
+                                    error.message,
+                                    uploadable
+                                );
+                            }
+                        })
                     ),
                 Promise.resolve()
             )
-            .then(
-                () => {
+            .then(() => {
+                if (anyFailures) {
+                    this._view.showError(genericErrorMessage);
+                    this._view.enableForm();
+                } else {
                     this._view.clearMessages();
                     misc.disableExitConfirmation();
                     const ctx = router.show(uri.formatClientLink("posts"));
                     ctx.controller.showSuccess("Posts uploaded.");
-                },
-                (error) => {
-                    if (error.uploadable) {
-                        if (error.similarPosts) {
-                            error.uploadable.lookalikes = error.similarPosts;
-                            this._view.updateUploadable(error.uploadable);
-                            this._view.showInfo(genericErrorMessage);
-                            this._view.showInfo(
-                                error.message,
-                                error.uploadable
-                            );
-                        } else {
-                            this._view.showError(genericErrorMessage);
-                            this._view.showError(
-                                error.message,
-                                error.uploadable
-                            );
-                        }
-                    } else {
-                        this._view.showError(error.message);
-                    }
-                    this._view.enableForm();
                 }
-            );
+            });
     }
 
-    _uploadSinglePost(uploadable, skipDuplicates) {
+    _uploadSinglePost(uploadable, skipDuplicates, alwaysUploadSimilar) {
         progress.start();
         let reverseSearchPromise = Promise.resolve();
         if (!uploadable.lookalikesConfirmed) {
@@ -128,7 +136,10 @@ class PostUploadController {
                     }
 
                     // notify about similar posts
-                    if (searchResult.similarPosts.length) {
+                    if (
+                        searchResult.similarPosts.length &&
+                        !alwaysUploadSimilar
+                    ) {
                         let error = new Error(
                             `Found ${searchResult.similarPosts.length} similar ` +
                                 "posts.\nYou can resume or discard this upload."
diff --git a/client/js/views/post_upload_view.js b/client/js/views/post_upload_view.js
index ce0cb42..b92a9ae 100644
--- a/client/js/views/post_upload_view.js
+++ b/client/js/views/post_upload_view.js
@@ -358,6 +358,8 @@ class PostUploadView extends events.EventTarget {
                 detail: {
                     uploadables: this._uploadables,
                     skipDuplicates: this._skipDuplicatesCheckboxNode.checked,
+                    alwaysUploadSimilar: this._alwaysUploadSimilarCheckboxNode
+                        .checked,
                 },
             })
         );
@@ -421,6 +423,12 @@ class PostUploadView extends events.EventTarget {
         return this._hostNode.querySelector("form [name=skip-duplicates]");
     }
 
+    get _alwaysUploadSimilarCheckboxNode() {
+        return this._hostNode.querySelector(
+            "form [name=always-upload-similar]"
+        );
+    }
+
     get _submitButtonNode() {
         return this._hostNode.querySelector("form [type=submit]");
     }