1) FATCA (Foreign Account Tax Compliance Act) requires foreign financial institutions to report information about financial accounts held by US taxpayers to the IRS. FFIs must enter agreements to share this information or face penalties like tax withholding.
2) Complying with FATCA's requirements will be extremely costly and challenging for financial institutions. It will require changes to internal systems, processes, and procedures across organizations.
3) FATCA will impact more than just financial institutions. All companies that make US-sourced payments abroad will need to modify their practices to comply with FATCA by 2013 to avoid penalties.