The Family of Companies processes vendor and contractor payments electronically via ACH (Automated Clearing House). All invoices must be submitted through the Vendor Portal, which provides secure access, submission tracking, and electronic payment remittance.

To enroll in ACH, please download, complete, and submit the appropriate form per the instructions provided. Do not submit until instructed to do so.

Benefits of ACH include:

• Emailed remittance advice
  

• Elimination of mail delays
  

Important: To avoid payment delays, ACH enrollment must be completed prior to submitting your first invoice.

ACH ENROLLMENT FORMS                                               

Georgia Transmission Corporation   _ NOTE:  GTC Contractors with existing service contracts are required to update their ACH information through the invoicing vendor portal.

Georgia System Operations Corporation

Vendor Invoicing Portal (For all service-based invoices)

Vendor Invoicing Portal - PACMAN 

GTC Vendor Portal and Electronic Invoices Gen Guidelines 1.2025.pdf

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