Is it possible to customize the Ageing Report Logic to remove a particular customer from showing up

Hi,

We are using the "Excise Under Rebate" process (which is a customization). There are debit memos created in Receivables in the name of the Statutory Authority, which are basically Refunds receivable from the tax authority.

But these aren't trade receivables and should not be appearing in any of the ageing reports are this would give a wrong picture. We would like to customize the report to pick all the records except for this particular customer ( Tax Authority).

Please advise if this customization is possible.

Thanks

Shankar