diff --git a/app/contributions/routes.py b/app/contributions/routes.py
index da6e26a3..4b5b3d1e 100644
--- a/app/contributions/routes.py
+++ b/app/contributions/routes.py
@@ -110,7 +110,10 @@ def spacy_nlp_pipeline_model(spacy_nlp_pipeline_model_id):
     )
 
 
+#region json-routes
 @bp.route('/spacy-nlp-pipeline-models/<hashid:spacy_nlp_pipeline_model_id>', methods=['DELETE'])
+@login_required
+@content_negotiation(produces='application/json')
 def delete_spacy_model(spacy_nlp_pipeline_model_id):
     def _delete_spacy_model(app, spacy_nlp_pipeline_model_id):
         with app.app_context():
@@ -118,18 +121,21 @@ def delete_spacy_model(spacy_nlp_pipeline_model_id):
             spacy_nlp_pipeline_model.delete()
             db.session.commit()
     
-    spacy_nlp_pipeline_model = SpaCyNLPPipelineModel.query.get_or_404(spacy_nlp_pipeline_model_id)
-    if not (spacy_nlp_pipeline_model.user == current_user or current_user.is_administrator()):
+    snpm = SpaCyNLPPipelineModel.query.get_or_404(spacy_nlp_pipeline_model_id)
+    if not (snpm.user == current_user or current_user.is_administrator()):
         abort(403)
     thread = Thread(
         target=_delete_spacy_model,
         args=(current_app._get_current_object(), spacy_nlp_pipeline_model_id)
     )
     thread.start()
-    return {}, 202
+    response = jsonify(
+        f'SpaCy NLP Pipeline Model "{snpm.title}" marked for deletion'
+    )
+    response.status_code = 202
+    return response
 
 
-#region json-routes
 @bp.route('/spacy-nlp-pipeline-models/<hashid:spacy_nlp_pipeline_model_id>/is_public', methods=['PUT'])
 @login_required
 @permission_required('CONTRIBUTE')
@@ -137,15 +143,14 @@ def delete_spacy_model(spacy_nlp_pipeline_model_id):
 def update_spacy_nlp_pipeline_model_is_public(spacy_nlp_pipeline_model_id):
     is_public = request.json
     if not isinstance(is_public, bool):
-        response = jsonify('The request body must be a boolean')
-        response.status_code = 400
-        abort(response)
-    spacy_nlp_pipeline_model = \
-        SpaCyNLPPipelineModel.query.get_or_404(spacy_nlp_pipeline_model_id)
-    spacy_nlp_pipeline_model.is_public = is_public
+        abort(400)
+    snpm = SpaCyNLPPipelineModel.query.get_or_404(spacy_nlp_pipeline_model_id)
+    if not (snpm.user == current_user or current_user.is_administrator()):
+        abort(403)
+    snpm.is_public = is_public
     db.session.commit()
     response = jsonify(
-        f'SpaCy NLP Pipeline Model "{spacy_nlp_pipeline_model.title}"'
+        f'SpaCy NLP Pipeline Model "{snpm.title}"'
         f' is now {"public" if is_public else "private"}'
     )
     response.status_code = 200
@@ -225,7 +230,10 @@ def tesseract_ocr_pipeline_model(tesseract_ocr_pipeline_model_id):
     )
 
 
+#region json-routes
 @bp.route('/tesseract-ocr-pipeline-models/<hashid:tesseract_ocr_pipeline_model_id>', methods=['DELETE'])
+@login_required
+@content_negotiation(produces='application/json')
 def delete_tesseract_model(tesseract_ocr_pipeline_model_id):
     def _delete_tesseract_ocr_pipeline_model(app, tesseract_ocr_pipeline_model_id):
         with app.app_context():
@@ -233,18 +241,21 @@ def delete_tesseract_model(tesseract_ocr_pipeline_model_id):
             tesseract_ocr_pipeline_model.delete()
             db.session.commit()
 
-    tesseract_ocr_pipeline_model = TesseractOCRPipelineModel.query.get_or_404(tesseract_ocr_pipeline_model_id)
-    if not (tesseract_ocr_pipeline_model.user == current_user or current_user.is_administrator()):
+    topm = TesseractOCRPipelineModel.query.get_or_404(tesseract_ocr_pipeline_model_id)
+    if not (topm.user == current_user or current_user.is_administrator()):
         abort(403)
     thread = Thread(
         target=_delete_tesseract_ocr_pipeline_model,
         args=(current_app._get_current_object(), tesseract_ocr_pipeline_model_id)
     )
     thread.start()
-    return {}, 202
+    response = jsonify(
+        f'Tesseract OCR Pipeline Model "{topm.title}" marked for deletion'
+    )
+    response.status_code = 200
+    return response
 
 
-#region json-routes
 @bp.route('/tesseract-ocr-pipeline-models/<hashid:tesseract_ocr_pipeline_model_id>/is_public', methods=['PUT'])
 @login_required
 @permission_required('CONTRIBUTE')
@@ -252,15 +263,14 @@ def delete_tesseract_model(tesseract_ocr_pipeline_model_id):
 def update_tesseract_ocr_pipeline_model_is_public(tesseract_ocr_pipeline_model_id):
     is_public = request.json
     if not isinstance(is_public, bool):
-        response = jsonify('The request body must be a boolean')
-        response.status_code = 400
-        abort(response)
-    tesseract_ocr_pipeline_model = \
-        TesseractOCRPipelineModel.query.get_or_404(tesseract_ocr_pipeline_model_id)
-    tesseract_ocr_pipeline_model.is_public = is_public
+        abort(400)
+    topm = TesseractOCRPipelineModel.query.get_or_404(tesseract_ocr_pipeline_model_id)
+    if not (topm.user == current_user or current_user.is_administrator()):
+        abort(403)
+    topm.is_public = is_public
     db.session.commit()
     response = jsonify(
-        f'Tesseract OCR Pipeline Model "{tesseract_ocr_pipeline_model.title}"'
+        f'Tesseract OCR Pipeline Model "{topm.title}"'
         f' is now {"public" if is_public else "private"}'
     )
     response.status_code = 200