Multan and Bahawalpur FIA units named six men, two already wanted, over unpaid overseas job promises and alleged Pakistani ID cards for Afghan citizens.
FIA Multan Zone says six people were taken into custody in linked Multan and Bahawalpur cases.
Four face accusations of taking large sums for overseas job visas that were never delivered.
Two men in Bahawalpur are accused of helping issue Pakistani CNICs to Afghan citizens.
Named sums range from Rs300,000 to about Rs75.1 million across separate complainants.
Two of those detained were already listed as proclaimed offenders.