Contact Us

General Contact Info

Phone support

Call 800-328-1935
International +1-773-462-2000

(24/7 assistance for limited services)  

Online chat

Chat with an Alliant representative

Service Hours:
Monday - Friday: 7 AM - 8 PM CT

Secure message

Send a secure message via online banking and receive a response within 2 business days.


U.S. territories mailing address

Alliant Credit Union
P.O. BOX 66945
Chicago, IL 60666-0945

International mailing address

Alliant Credit Union
P.O. BOX 2387
Des Plaines, IL 60017-2387

Written disputes

Alliant Credit Union
ATTN: Cards Risk Management Team
P.O. BOX 10409
Des Moines, IA 50306

Debit and Credit Cards

Access account info or report fraud

Log in to online banking or call 800-328-1935

(24/7 assistance for limited services)  

Full Service Hours:
Monday - Friday: 7 AM - 8 PM CT
Saturday - Sunday: 9 AM - 6 PM CT

Report lost or stolen cards

Credit Card applications

800-328-1935 (Ext. 2570)

Monday - Friday: 8 AM - 5 PM CT

Payments via USPS

Alliant Credit Union
P.O. BOX 1666
Des Plaines, IL 60017-1666

Payments via FedEx

Alliant Credit Union
Att: Plastic Card Operations
11545 W Touhy Ave
Chicago, IL 60666

Visa benefit support

800-VISA-2911 (24/7)

Loans

Tesla, Auto and RV

Make a payment

New and in-progress applications

800-328-1935 Ext.2570

Monday - Friday: 8 AM - 5 PM CT

Phone support

800-328-1935

Monday - Friday: 7 AM - 8 PM CT
Saturday - Sunday: 9 AM - 6 PM CT

Personal Loans

Make a payment

New and in-progress applications

800-328-1935 Ext.2570

Monday - Friday: 8 AM - 5 PM CT

Phone support

800-328-1935

Monday - Friday: 7 AM - 8 PM CT
Saturday - Sunday: 9 AM - 6 PM CT

Home Equity Line of Credit

Make a payment

New and in-progress applications

800-328-1935 Ext.2570

Monday - Friday: 8 AM - 5 PM CT

Phone support

800-328-1935

Monday - Friday: 7 AM - 8 PM CT
Saturday - Sunday: 9 AM - 6 PM CT

Mortgage

Serviced by Dovenmuehle (DMI)

Make a payment

Phone support and payment

866-341-1017

Monday - Friday: 8 AM - 5 PM CT