作文一：NOTICE OF CREDIT LIMIT
A review of your account indicates a present balance of $_ owed our firm.
Every account is carefully evaluated to establish a credit limit that we believe is consistent not only with our interests， but the interests of the customer as well. We have established $_， as your credit allowance and believe it is appropriate.
Since you are at or near that credit limit， we can ship future orders only on a C.O.D. basis， until your balance is reduced.
We would be pleased to review your account with you if you believe an increased credit line is justified.
We are confident you understand the need for this action.
作文二：DISPUTED BALANCE NOTICE
We are in receipt of your statement dated _， 19_，indicating an account balance of $_.
We dispute said balance for the reason[s] checked.
____ Goods billed for have not been received.
____ Prices are in excess of agreed amount.
____ Prior payment made in the amount of $_ on _， 19_.
____ Goods were unordered.
____ Goods were defective as per prior notice.
____ Goods are available for return as per our right of return and credit.
____ Other [Describe] _
Please adjust our account.
作文三：NOTICE OF CLAIM OF DEFECTIVE GOODS
We have purchased a product sold or manufactured by you described as：_
One of our customers has advised us of a product defect in the following particulars：_
Name of customer： _
Approximate date of purchase： _
Nature of defect： _
Injuries claimed： _
In the event suit is brought against us arising from Breach of Warranty of Merchantability， we shall in a like manner look to you for full reimbursement.
This letter is provided to give you earliest possible notice of a potential claim.