Clearence Letter for complition of Webproject

I would like to write a letter for my customer when we finished his project in which we want to write our custome you webdevelopment has finished and now we are ready to upload you project so please clear you overdue payment than we will be upload you web.

I have already write a letter so please make modification of this letter if possible. It will great help for me.
Mr. Person Name.
Company Name
Address Line 1
Address Line 2 Dear Ms./Mrs./Mr. Last Name: Subject: Confirmation Letter about web completion for you companyTornado Computer Trading is pleased to announce a completion of web development of its company name , About which LPO No ------ was received at dated --------------.Our records indicate that payment on your account is overdue in the amount of Aed [Balance amount].A Invoice with an initial payment in the form of received payment and balance amount detailed is attached with this letter.Please make out your check or deposit balance amount in our bank account #. Which will help for us to online you project on you domain [domain name.while this reminder is has your full attention

Thank you in advance for your anticipated cooperation in this matter Signature

Your Name
Your Title