diff --git a/cope2n-api/fwd_api/utils/process.py b/cope2n-api/fwd_api/utils/process.py
index 9e02381..0e2f248 100644
--- a/cope2n-api/fwd_api/utils/process.py
+++ b/cope2n-api/fwd_api/utils/process.py
@@ -136,7 +136,7 @@ def sbt_validate_ocr_request_and_get(request, subscription):
     invoice_file = request.data.getlist('invoice_file')
     redemption_ID = request.data.get('redemption_ID', None)
 
-    FileUtils.validate_list_file(imei_files, file_field="imei_file")
+    FileUtils.validate_list_file(imei_files, max_file_num=settings.MAX_UPLOAD_FILES_IN_A_REQUEST, min_file_num=0, file_field="imei_file")
     FileUtils.validate_list_file(invoice_file, max_file_num=1, min_file_num=0, file_field="invoice_file")
 
     validated_data['imei_file'] = imei_files