PO is created without P-CARD details

PO was created by autocreate Process from approved requisition using the createpo process.

P-card on requisition was end dated during the approval process.

When the final approver approved the requisition a PO# was generated by the autocreate process, it took out the p-card information & put the payment terms as NET30 instead. we found out this is standard process.

We would like to customize this process.

We need to stop creating POs if P-card is inactive.

Could you please provide us the some document or oracle package name where we can add our customization.