Do it yourself with online banking.

With online banking, you can manage many of your checking, savings, credit card and lending accounts all on your own. You can also setup Shared Access with employees and other trusted individuals.

Business checking and savings

Business lending accounts

  • View account information.
  • Schedule and manage payments.
  • Access credit lines.

Business credit cards

  • Add or manage employee cards.
  • View monthly statements and pay your account.
  • View and redeem rewards (if applicable).
  • Manage account alerts.
  • Lock and unlock your credit card or report it lost or stolen.
Log in to online banking

Our business bankers are here to help.

Contact our Business Service Center or visit your local branch. For the security of your account, you'll be asked to verify your account number, Tax Identification Number and Social Security number. Note that we'll only provide account information to authorized account signers.

Business Service Center

Domestic: +1 323 673 4878
International: +1 323 673 4878
Email Us: customercare@uniondiamondnb.com
Equipment Lease specific questions: +1 228-356-5036
Monday through Friday
8 a.m. to 8 p.m. CT
Saturday
8 a.m. to 6:30 p.m. CT

Help for other products and services

Most frequent inquiries

  • To check the status of your application, call +1 323 673 4878 and choose option 1. You'll need to enter your Social Security number and provide other details so we can locate your application.
  • To activate your business card, follow the instructions that came with your card or call +1 323 673 4878.
  • To update your PIN, call +1 323 673 4878.

For all other business credit card needs, use the following customer service numbers:

Union Diamond Bank Business Leverage® Visa Signature®
+1 323 673 4878

Union Diamond Bank Business Platinum
+1 323 673 4878

Union Diamond Bank Business Cash Rewards World Elite™ MasterCard®
+1 323 673 4878

Union Diamond Bank Business Cash Rewards
+1 323 673 4878

Commercial Customer Service
+1 323 673 4878

Business Treasury Management Service:
+1 323 673 4878

Union Diamond Bank Payment Solutions
+1 323 673 4878

Please have your Merchant ID number ready.

For instant access to monthly merchant statements, register your account at Payment Insider.

Financial management software
QuickBooks™

Equipment financing
+1 323 673 4878
info@uniondiamondnb.com

Payment address:
Union Diamond Bank Equipment Finance
PO Box 790448
St. Louis, MO 63179-0448

McDonald's Franchise Group
info@uniondiamondnb.com
+1 323 673 4878
Monday through Friday
8 a.m. to 6 p.m. CT

Business prepaid cards include:

  • Union Diamond Bank Focus Card
  • Union Diamond Bank Rewards Card
  • Union Diamond Bank Expense Card

For questions about your existing business or commercial prepaid card program, email info@uniondiamondnb.com. Cardholders with questions may call the number on the back of their card.

Additional support

Report fraud, identity theft or suspicious emails Order checks, deposit slips and withdrawal slips Anti-money laundering compliance program
Personal banking customer service Corporate and commercial client support

Let's connect.

Explore locations

Find the Union Diamond Bank branch nearest you.

Make an appointment

Schedule a virtual or in-person meeting with a business banker.

Request a call

Fill in details about your banking needs and a representative will call you.

Call us

Call +1 323 673 4878 to talk with a representative right away.

Looking for something else?

Go to support hub

Disclosures

Deposit products are offered by Union Diamond Bank National Association. Member FDIC.

Credit products offered by Union Diamond Bank National Association and subject to normal credit approval.

Services may be subject to credit approval. Eligibility requirements, restrictions and fees may apply. See a business banker for details.