English Bus/Financial Finance (general)

I am translating a document "Terms and Conditions" prepared by company X


Net 30 payment terms
If payment is not required when placing an order, invoices are due 30 calendar days following the invoice date unless the invoice spcifies other payment terms (the Due Date). Payments are to be made to Company X's office or such other address as is stated on the invoice.

****Payments will be posted to your account**** on the date received by Company X. You agree that any amounts not paid by the Due Date are subject to a late payment charge of 1.5% per month.

Can you please re-word this fragment for me?
Thank you in advance