By default, HasOffers is notified of a conversion using Publisher ID tracking method (aff_id, sub_id). In this case, PX informs HasOffers that the corresponding Publisher should be credited for a conversion. However, using Transaction ID method allows Publisher to get information not only about the number of conversions, but also which particular clicks led to these conversions.
It is recommended to set postback to Transaction ID when using HasOffers integration because it is a much more granular way of conversion tracking. If you wish to use Transaction ID in your postback, notify our Support Department so that they make necessary changes.
If you choose Transaction ID conversion tracking method, make sure you send Transaction ID formed by HasOffers in each of your Leads in LeadData section. Otherwise, it will be impossible to match your conversions to specific Leads.