diff --git a/app/controllers/transactions_controller.rb b/app/controllers/transactions_controller.rb
index f9d1be7..230cd44 100644
--- a/app/controllers/transactions_controller.rb
+++ b/app/controllers/transactions_controller.rb
@@ -25,8 +25,8 @@ class TransactionsController < ApplicationController
           .permit(:debtor, :creditor, :message, :euros, :cents)
 
     {
-      debtor: User.find_by(name: t[:debtor]) || User.zeus,
-      creditor: User.find_by(name: t[:creditor]) || User.zeus,
+      debtor: t[:debtor] ? User.find_or_create_by(name: t[:debtor]) : User.zeus,
+      creditor: t[:creator] ? User.find_or_create_by(name: t[:creditor]) : User.zeus,
       issuer: current_client || current_user,
       amount: (t[:euros].to_f*100 + t[:cents].to_f).to_i,
       message: t[:message]