How to handle deleted infotype records at PU12

Hi friends!

Any ideas, how can we ask PU12 interface to capture deleted infotype records in the interface file?

When we run PU12 interface program to export to a third party system, we get only inserted and updated records but when i try deleting a record eg from IT 0015 there is no such record in the list.

As the deleted record should be present in the file so that both SAP and Third party systems must be in sync.

Thanks.

Any inputs.