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APHIS Modifies Core Message Set Help Desk Staffing Schedule

Starting July 13, 2022, the APHIS Core Message Set Help Desk will be staffed Monday through Friday from 8 a.m. to 7 p.m. Eastern Time to assist stakeholders submitting APHIS Core Message Sets in the Automated Commercial Environment (ACE).

The Help Desk staff is on hand to review stakeholder message sets, clarify error codes and flags, provide disclaim guidance, and answer general message set questions.

The APHIS Core Message Set Help Desk is available 24 hours a day, 7 days a week. Stakeholders can call 1-833-481-2102 or e-mail to access the Help Desk.

If you are calling:

  • Select Option 1 for new inquiries
  • Select Option 2 for existing inquiries (include your reference ticket)
If you are emailing:
  • If available, provide a copy of your full Message Set transmission and/or associated error codes
Additionally, users can visit APHIS’ ACE webpage and the APHIS Core Message Set Questions and Answers webpage for additional information and resources.

USDA touches the lives of all Americans each day in so many positive ways. In the Biden-Harris Administration, USDA is transforming America’s food system with a greater focus on more resilient local and regional food production, fairer markets for all producers, ensuring access to safe, healthy and nutritious food in all communities, building new markets and streams of income for farmers and producers using climate smart food and forestry practices, making historic investments in infrastructure and clean energy capabilities in rural America, and committing to equity across the Department by removing systemic barriers and building a workforce more representative of America. To learn more, visit

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