Customer Name
And Address
00/00/00
Dear XXXXXXXXX
Re Account Number 00000000 Trading Outside terms
Numerous requests for payment have gone unheeded and you now leave us with no alternative but to take legal action if your remittance has not been received by 00/00/00.
Please note your credit record may be affected if legal action is taken.
Should you have any queries or wish to discuss your situation please do not hesitate to call me on 000000000000.
Yours Sincerely