diff --git a/backend/apps/ifc_validation/tasks/processing/bsdd.py b/backend/apps/ifc_validation/tasks/processing/bsdd.py
index b5990ef3..749b9313 100644
--- a/backend/apps/ifc_validation/tasks/processing/bsdd.py
+++ b/backend/apps/ifc_validation/tasks/processing/bsdd.py
@@ -38,5 +38,3 @@ def process_bsdd(context:TaskContext):
         agg_status = context.task.determine_aggregate_status()
         model.status_bsdd = agg_status
         model.save(update_fields=['status_bsdd'])
-
-        return f"agg_status = {Model.Status(agg_status).label}\nmessages = {json_output['messages']}"
\ No newline at end of file
diff --git a/backend/apps/ifc_validation/tasks/processing/digital_signatures.py b/backend/apps/ifc_validation/tasks/processing/digital_signatures.py
index ea65fe4e..d4eb4237 100644
--- a/backend/apps/ifc_validation/tasks/processing/digital_signatures.py
+++ b/backend/apps/ifc_validation/tasks/processing/digital_signatures.py
@@ -26,4 +26,4 @@ def create_outcome(di):
         ValidationOutcome.objects.bulk_create(list(map(create_outcome, output)), batch_size=DJANGO_DB_BULK_CREATE_BATCH_SIZE)
 
         model.save(update_fields=['status_signatures'])
-        return 'Digital signature check completed' if success else f"Script returned exit code {context.result.returncode} and {context.result.stderr}"
+        logger.info('Digital signature check completed' if success else f"Script returned exit code {context.result.returncode} and {context.result.stderr}")
diff --git a/backend/apps/ifc_validation/tasks/processing/gherkin.py b/backend/apps/ifc_validation/tasks/processing/gherkin.py
index a38d5a93..b229d0c2 100644
--- a/backend/apps/ifc_validation/tasks/processing/gherkin.py
+++ b/backend/apps/ifc_validation/tasks/processing/gherkin.py
@@ -9,8 +9,6 @@ def process_gherkin_outcomes(context:TaskContext):
         agg_status = context.task.determine_aggregate_status()
         setattr(model, status_field, agg_status)
         model.save(update_fields=[status_field])
-        
-        return f'agg_status = {Model.Status(agg_status).label}\nraw_output = {context.result}' 
     
 def process_normative_ia(context:TaskContext):
     return process_gherkin_outcomes(context)
diff --git a/backend/apps/ifc_validation/tasks/processing/header.py b/backend/apps/ifc_validation/tasks/processing/header.py
index 7e7328d3..52e6e54b 100644
--- a/backend/apps/ifc_validation/tasks/processing/header.py
+++ b/backend/apps/ifc_validation/tasks/processing/header.py
@@ -82,5 +82,3 @@ def process_header(context:TaskContext):
         model.header_validation = header_validation
         model.save(update_fields=['status_header', 'header_validation']) 
         model.save()
-        
-        return f'agg_status = {Model.Status(agg_status).label}\nraw_output = {header_validation}'
diff --git a/backend/apps/ifc_validation/tasks/processing/instance_completion.py b/backend/apps/ifc_validation/tasks/processing/instance_completion.py
index 1e26e6c5..adfbe73a 100644
--- a/backend/apps/ifc_validation/tasks/processing/instance_completion.py
+++ b/backend/apps/ifc_validation/tasks/processing/instance_completion.py
@@ -18,4 +18,4 @@ def process_instance_completion(context:TaskContext):
             inst.ifc_type = ifc_file[inst.stepfile_id].is_a()
             inst.save()
 
-        return f'Updated {instance_count:,} ModelInstance record(s)'
+        logger.info(f'Updated {instance_count:,} ModelInstance record(s)')
diff --git a/backend/apps/ifc_validation/tasks/processing/schema.py b/backend/apps/ifc_validation/tasks/processing/schema.py
index 0445c141..29cdfa40 100644
--- a/backend/apps/ifc_validation/tasks/processing/schema.py
+++ b/backend/apps/ifc_validation/tasks/processing/schema.py
@@ -57,6 +57,4 @@ def process_schema(context:TaskContext):
 
             ValidationOutcome.objects.bulk_create(outcomes_to_save, batch_size=DJANGO_DB_BULK_CREATE_BATCH_SIZE)
 
-        model.save(update_fields=['status_schema'])
-
-        return "No IFC schema errors." if success else f"'ifcopenshell.validate' returned exit code {context.proc.returncode} and {len(output):,} errors."
+        model.save(update_fields=['status_schema'])
\ No newline at end of file
diff --git a/backend/apps/ifc_validation/tasks/processing/syntax.py b/backend/apps/ifc_validation/tasks/processing/syntax.py
index 112cbab9..d785c7ed 100644
--- a/backend/apps/ifc_validation/tasks/processing/syntax.py
+++ b/backend/apps/ifc_validation/tasks/processing/syntax.py
@@ -39,7 +39,7 @@ def process_syntax_outcomes(context:TaskContext):
         model.save(update_fields=[status_field])
         
         # return reason for logging
-        return "No IFC syntax error(s)." if success else f"Found IFC syntax errors:\n\nConsole: \n{output}\n\nError: {error_output}"
+        logger.info("No IFC syntax error(s)." if success else f"Found IFC syntax errors:\n\nConsole: \n{output}\n\nError: {error_output}")
 
 
 def process_syntax(context:TaskContext):