Need to call a procedure when invoice is validated using form personalization

Hi,

I need to call a procedure when invoice is validated using form personalization.

The procedure has the inputs of Invoice distribution DFF field(attribute13), Invoice distribution amount ,Org ID , Invoice ID.

Since Invoice header and Invoice distribution is a separate screen, Inputs are hard to pass.

Kindly suggest your ideas on which trigger event/ trigger object to be used and what should be the condition and action of it.

Thanks!