Step 1> Log in to your z.com account. Log in link: https://cloud.z.com/mm/signin/ Step 2 > Click the user icon. Step 3 > Click the billing information. Step 4 > Download the invoice PDF. Step 5 > Open your PDF and you will find your Invoice Number. 145Billing & PaymentRelated Knowledge Base Posts -How to check the payment top-up amount at the Z.com account?How to check Bill history and top-up history at the Z.com account?