How to check Third Party Invoicing on IDE

Hi folk,

For GAS sector in a deregulated market, we need to import Third Party Invoicing (TPI) using the ISU_MR_UPLOAD02 iDoc through the Intercompany Data Exchange (IDE) module. However, before posting the iDoc, we would need to validate different iDoc data (TIP data).

Where could be this customizing done on IDE to validate data and so avoid posting iDoc data in error? What type of checking could be done?

Thanks in advance,

Samantha.