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System-to-System Interface Option for States and Employers

e-IWO Software Interface Specification

Published: June 6, 2018

The Software Interface Specification provides information for flat file record layouts and XML schemas based on the Income Withholding Order/Notice for Support (IWO). The file exchange process enables states and employers to electronically transmit IWOs.

OCSE hosts an e-IWO system that supports the transmission of income withholding information from states to employers and payroll processors. The system returns notification files to states from employers about the processing status of IWOs. It also allows employers to notify states about upcoming lump sum payments and employee terminations.

Last Reviewed: June 6, 2018

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