diff --git a/app/services/legal_framework/proceeding_types/all.rb b/app/services/legal_framework/proceeding_types/all.rb
index d67cef0ec9..d37858cde2 100644
--- a/app/services/legal_framework/proceeding_types/all.rb
+++ b/app/services/legal_framework/proceeding_types/all.rb
@@ -42,7 +42,7 @@ def call
 
       def request_body
         {
-          current_proceedings: @legal_aid_application.proceedings&.map(&:ccms_code)&.join(","),
+          current_proceedings: @legal_aid_application.proceedings&.map(&:ccms_code),
           allowed_categories: %w[MAT], # TODO: replace with details from new PDA, for now hardcoded to only current category type
           search_term: "", # TODO: add optional parameter to the initializer, but for now leave always empty
         }.to_json