Sign up for Guardian's Automatic Payment Program today! We invite you to enroll in our convenient, "Automatic Payment Program." This Program allows you to have your periodic invoice paid automatically via transfer from your credit, debit card account, or your checking account when each payment is due. Each transaction is recorded on your monthly statement. Current Guardian customers can also use this sign up form to update their current ACH information. Click here and sign up for Automatic Payments (ACH). Customer Billing Information Customers may contact Guardian's Customer Service Center and speak to one of our representatives 8:00 AM to 6:30 PM - Monday thru Friday EST. In addition customers may e-mail service requests to Customer Service using this online form or fax us at (248) 395-1467 24 hours a day. SPECIAL NOTE: If you are a new customer, or have recently added additional services, your invoice may include Pro-Rated Charges. Guardian's service charges are billed in advance.