What are the checkpoints will you suggest to prevent frauds in invoicing or billing?

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I suggest following points to prevent frauds in invoicing or billing

1. There should be 3 individuals to sign the invoice one maker, other checker and approver.
2. All invoices or bills should be acknowledged by customers that he received goods etc. in proper condition.
3. Invoice should cover all the terms and conditions of purchase order.
4. a copy of purchase order issued by client should e attached and send to customer.
5. The format of invoice should be clear and should be generally acceptable.
6. All the copies of invoices should be kept under safe custody
7. To avoid the duplicity the invoices should have a unique rubber seal and same should be kept safe.
8. statement of account to customer with invoice reference should be send periodically to get a indirect confirmation from him & if any thing wrong customer shall notify.
9. Once invoice raised and any corrections are found should be settled with DR. Note or CR. Note and invoice should never be altered.
10. All the local laws and Tax laws should be kept in mind while preparing the invoice
11. There should be regular audit of invoices or bills by expert person like internal auditor or equivalent.

1. Implement the 5 basic dupe searches if you haven’t already.

2. Implement some fuzzy-matching

3. Rounded-Amount Invoices

4. Invoices Just Below Approval Amounts

5.Check Theft Search

Thanks for invitation:

I agree  the previous answers with Anil..

thanks

-         - 3 way matching

-        -  Canceling vouchers and supporting papers by the treasury department upon payment to prevent the resubmission of vendor invoices after they have been paid.