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e-IWO Record Layouts (New)

Version 4.0
March 20, 2024

Provides the universal record layouts for the e-IWO system

Explains actions private employers and federal agencies must take when an employee is terminated or rehired

Template for organization to submit multiple Federal Employer Identification Numbers (FEIN) during the registration process

Detailed Overview of the e-NMSN Process

Another Paperless Solution
March 9, 2022

Provides an overview of the e-NMSN process and options available to states and employers

e-NMSN Software Interface Specification (Updated)

Version 1.6
January 31, 2022

Provides software interface specification of an electronic version of the National Medical Support Notice for the employer

How to Complete an Income Withholding for Support Order

A Guide to the IWO and Instructions
January 19, 2021

Training presentation provides directions on how to complete the Income Withholding for Support Order (IWO)

Tips and options to help employers switch from paper checks to electronic payments to states

Guidance on what can and cannot be changed on the standard OMB-approved IWO form

For state agency staff, this explains some differences between independent contractors and employees

System-to-System Interface Option for States and Employers

e-IWO Software Interface Specification
June 6, 2018

Provides a processing overview and technical specifications for the electronic transmission of income withholding information