أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
Firstly you have to make sure proper receipt of any payment and the mode of payment by the client or customer.
Keep a follow up of the customer to ensure good relationship co-exists for further dealings.
You should always keep a customer record and proper database for all customers.
Ethics & code of conduct .
