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Credit Card: 866-444-8529
ATM/Debit Card: 800-328-1935



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Bank Routing Number


P.O. Box for Credit Card Payments

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

P.O. Box for Consumer Loan Payments (Auto, RV, Personal & HELOC)

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

Make Online Payments on Past-Due Credit Cards or Consumer Loans

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P.O. Box for Mortgage Loan Payments (varies by state of property)

NOTE: Mortgage payments sent to PO Boxes other than the those specified below may be returned resulting in late fees and delinquent credit reporting.

  • AZ, CA, HI, NV - PO Box 7168, Pasadena, CA 91109-7168
  • IA, IL, MN, MO, ND, NE, SD, TN, WI - PO Box 0054, Palatine, IL 60055-0054
  • CT, DC, DE, IN, KY, MA, MD, MI, NC, NJ, NY, OH, PA, RI, SC, VA, WV - PO Box 371306, Pittsburgh, PA 15250-7306
  • AK, AL, AR, CO, FL, GA, ID, KS, LA, ME, MS, MT, NH, NM, OK, OR, TX, UT, VT, WA, WY - PO Box 660592, Dallas, TX 75266- 0592
P.O. Box for Deposits

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

Do not use old deposit tickets, loan coupons or mailing labels that indicate an address other than the address listed above. Save time & money - deposit your checks via our mobile app.

We only accept cash deposits via select ATMs. Please use our ATM locator on our mobile app or via Online Banking.
RESPA Qualified Written Request Disclaimer

You have certain rights under Federal law related to resolving errors and requesting information about the servicing of your mortgage. PURSUANT TO § 6 OF RESPA, A "QUALIFIED WRITTEN REQUEST" REGARDING THE SERVICING OF YOUR LOAN MUST BE SENT TO THIS ADDRESS: ALLIANT CREDIT UNION, ATTN: CUSTOMER RESEARCH TEAM, MS-NOE, P.O. Box 66945, Chicago, IL 60666-0945. A "qualified written request" is written correspondence, other than notice on a payment coupon or statement, which includes your name, account number, and the detailed reason(s) for the request. We will acknowledge receipt of your request within five business days of receiving it, and provide you with a full response or resolution within 30 business days of receipt.