Contact Alliant Credit Union Customer Service

The customer care representatives at the company helpline are available 24/7. You can call the Help Center for information or support anytime, day or night, and live agents will be ready to provide instructions to solve the issue. The Alliant Credit Union hours for International Calls are the same. You can reach the assistants 24/7, even from abroad.

You can also use the live chat to receive help and answers to your questions from a live person. Click the Chat Now button in the bottom right corner of the Contact Us page and enter the required information to initiate the conversation. The virtual assistant is available for simple questions 24/7.

The corporate office address is Alliant Credit Union, 11545 W. Touhy Ave., Chicago, IL 60666, United States. Note that it is not open to the public and has no branches or ATMs.

The Alliant Credit Union address for Auto, RV, Personal, and HELOC Consumer Loan Payments is PO Box 2387, Des Plains, IL, 60017-2387. The company address for Credit Card Payments is PO Box 1666, Des Plaines, IL, 60017-1666. For deposits, you can use the following address: Alliant Credit Union, PO Box 2387, Des Plaines, IL, 60017-2387.

You can check the Mortgage Loan Payments address for your area on the Contact Us page, as it varies by state of property.