diff --git a/.upgradenotes/MDL-78711-2025021013223613.yml b/.upgradenotes/MDL-78711-2025021013223613.yml
new file mode 100644
index 00000000000..8fcc197bbcb
--- /dev/null
+++ b/.upgradenotes/MDL-78711-2025021013223613.yml
@@ -0,0 +1,5 @@
+issueNumber: MDL-78711
+notes:
+  core_course:
+    - message: Final deprecation of edit_default_completion()
+      type: removed
diff --git a/course/classes/output/bulk_activity_completion_renderer.php b/course/classes/output/bulk_activity_completion_renderer.php
index 1d4cd87c729..0d23248ca85 100644
--- a/course/classes/output/bulk_activity_completion_renderer.php
+++ b/course/classes/output/bulk_activity_completion_renderer.php
@@ -117,28 +117,11 @@ class core_course_bulk_activity_completion_renderer extends plugin_renderer_base
     }
 
     /**
-     * Renders the form for editing default completion
-     *
-     * @param moodleform $form
-     * @param array $modules
-     * @return string
      * @deprecated since Moodle 4.3 MDL-78528
-     * @todo MDL-78711 This will be deleted in Moodle 4.7
      */
-    public function edit_default_completion($form, $modules) {
-        debugging('edit_default_completion() is deprecated and will be removed.', DEBUG_DEVELOPER);
-
-        ob_start();
-        $form->display();
-        $formhtml = ob_get_contents();
-        ob_end_clean();
-
-        $data = (object)[
-            'form' => $formhtml,
-            'modules' => array_values($modules),
-            'modulescount' => count($modules),
-        ];
-        return parent::render_from_template('core_course/editdefaultcompletion', $data);
+    #[\core\attribute\deprecated(null, since: '4.3', mdl: 'MDL-78528', final: true)]
+    public function edit_default_completion() {
+        \core\deprecation::emit_deprecation_if_present([self::class, __FUNCTION__]);
     }
 
     /**
diff --git a/course/templates/editdefaultcompletion.mustache b/course/templates/editdefaultcompletion.mustache
deleted file mode 100644
index 31c5300bbc0..00000000000
--- a/course/templates/editdefaultcompletion.mustache
+++ /dev/null
@@ -1,47 +0,0 @@
-{{!
-    This file is part of Moodle - http://moodle.org/
-
-    Moodle is free software: you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    Moodle is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
-}}
-{{!
-    @template core_course/editdefaultcompletion
-
-    Edit default module completion screen
-
-    Example context (json):
-    {
-        "form": "<form><p>Placeholder for the form</p></form>",
-        "modulescount": 1,
-        "modules": [{
-            "id": "10",
-            "formattedname": "Assignment",
-            "icon": "https://raw.githubusercontent.com/moodle/moodle/master/mod/assign/pix/monologo.svg"
-        }]
-    }
-}}
-<p>{{#str}}modifybulkactions, completion{{/str}}</p>
-{{{form}}}
-<p>{{#str}}affectedactivities, completion, {{modulescount}}{{/str}}</p>
-<div class="container-fluid">
-    <div class="modules mb-1">
-        <div class="row mb-1">
-            {{#modules}}
-                <div class="col-sm-2">
-                    <img src="{{icon}}" class="me-1 mb-1" alt="">
-                    <span>{{{formattedname}}}</span>
-                </div>
-            {{/modules}}
-        </div>
-    </div>
-</div>