Dear Sir/Madam
Account No:
You have contacted me regarding the account with the above reference number, which you claim I owe.
I have no knowledge of any such debt being owed and I dispute any personal liability for this debt.
Please do not make any further contact about the above account unless you can provide evidence of my liability for the debt.
I await your written confirmation that this matter is now closed.
I look forward to hearing from you.
Yours faithfully