Welcome, here you're first.

You're at the heart of everything we do and we're committed to providing you with an exceptional experience! We understand that change can bring questions, and you'll find many of the answers you're looking for here. However, if you don't find what you need, please contact us. Our goal is to make this transition as smooth as possible.

Need to know...

1

NEW routing number
071900760.

2

Account numbers
are NOT changing.*

 
3

Update Auto Pay and digital wallets with new O2 Debit Card information.

 

 

Important Reminders

  • Update your routing number to 071900760 on any direct deposit or ACH (Auto Pay) payment accounts that were previously set up with your Evergreen Bank Group (EBG) routing number.

  • Activate your new debit card, if you haven't already.

  • Update your automatic payments and digital wallets with your new debit card information. 

  • Enroll in eStatements (optional).

  • Log in to O2 Digital Banking for the first time.

    • Access O2 Digital Banking (online and mobile). 
      • To login online visit www.oldsecond.com and click on the LOG IN button on the top right side of the page.
      • To login using our mobile app, you can find download links in the Digital Banking section below.

    • Access Corporate O2 Digital Banking (online and mobile) for Treasury Management. 
      • To login online visit www.oldsecond.com and click on the LOG IN button on the top right side of the page.
      • Add Corporate O2 Mobile to your mobile device by following the steps found here.  

  

*Some accounts that resulted in a duplicate account through the transition may need to have their number changed. Impacted customers will be notified.

Call 877 866 0202 with questions.

Questions & Answers

When will I become an Old Second National Bank customer?
As of the close of the business day on October 17, 2025, your account(s) will be transitioned from EBG to Old Second, and you will be an Old Second customer. To view the Account Conversion Breakdowns for Checking and Savings accounts please use the links below: 
Will my account number(s) change?
No, your account number(s) will remain the same. Some accounts that resulted in a duplicate account through the transition may need to have their number changed. Impacted customers will be notified.
Will my routing number change?
Yes. Please note: Although your existing routing number will remain active for a period of time, we encourage you to update your routing number wherever necessary including direct deposit or ACH (Auto Pay) payment accounts that are currently set up with your EBG routing number. The new routing number is 071900760.
When will my new debit card arrive?
You can expect your new debit card to arrive the week of October 6th. Please plan on activating it on or after October 20, 2025. You may continue using your current Evergreen Bank Group debit card through 11:59 p.m. CST on October 19, 2025. Do not use your current EBG card AFTER October 20, 2025, as transactions will be denied.
When will I be able to access my account online and/or through a mobile app?
Access to digital banking for both online and mobile will be available on October 20th.
Do I have to re-enroll in eStatements?
Yes. Your enrollment with EBG eStatements does not automatically transfer over so you'll have to enroll with Old Second to start receiving eStatements. Enrolling in eStatements is always optional.
Do I have to set up Bill Pay?
No. Your Bill Pay payee information and payments will convert but
please check for accuracy when you log in for the first time. Contact us
at 877-866-0202 if you need assistance or have questions.
Will Zelle still work?
You will need to re-register with Zelle through O2 Digital Banking by selecting Send Money with Zelle®. Zelle is not available for business accounts.
Will I have to order new checks for my personal account? 
No. Your current checks can still be used until you’ve finished your supply. You will not need to get any new checks for your account unless we notify you otherwise, or you are in need of a re-order.
Will I have to order new checks for my commercial account? 
Yes. To get you started, you can request that your banker order you wallet size business checks (quantity of 60). No water marks, customizations, logos, duplicates, endorsement stamps or computer checks are included
with this initial complimentary order.
Who should I call if I have more questions? 
Please call 877-866-0202 if you have any questions or concerns.

Digital Banking (Online & Mobile)

O2 Digital Banking App

O2 Digital Banking is your personal financial advocate that gives you the ability to aggregate all of your financial accounts, including accounts from other banks and credit unions, into a single view. It's secure and gives you the power to effortlessly manage your finances with the right tools at your fingertips.

O2 Banking App Icon
Apple Store Download Badge Google Play Download Badge

O2 Digital Banking ACTION ITEMS:

You will receive a welcome email with information on how to log in to
O2 Digital Banking for the first time.

  • Enroll in eStatements.
  • Enroll in Mobile Deposit.
  • Re-register for Zelle®.
  • Set up any balance or account alerts.
  • Review Bill Pay payees and recurring payments for accuracy.

 

  

 

Corporate O2 Digital Banking

Corporate O2 is our commercial digital banking platform, which includes a desktop online banking service as well as a mobile experience (Corporate O2 Mobile).

Corporate O2 Digital Banking ACTION ITEMS:

You will receive a welcome email with information on how to log in to
Corporate O2 Digital Banking for the first time.

  • You will receive an email with login instructions by 9 a.m. CST on Monday, October 20, 2025. 
  • Please check that all transferred information for Bill Pay is correct.
  • Set up account alerts as these will not transfer from your EBG online account.
  • Enroll in eStatements.
  • ACH Origination - Review converted batches and upload ACH templates from EBG as needed.
  • Wire Transfers - Review any converted wire templates and enter any that did not convert from EBG.
  • Remote Deposit Capture - Install Old Second's scanning application and drivers.

    • For assistance with the initial installation process and a quick review of the new deposit steps, contact our installation support team at 877-542-2244, option 3, option 3 or by clicking here to schedule a call. Appointment times begin on the morning of October 20th and for the following 2 weeks. To ensure you are able to book a time that meets your needs, please reach out at your earliest convenience.

    • Mobile Remote Deposit Capture - Access Corporate O2 Mobile to begin making deposits.

  • Check Positive Pay - Enter your check upload format, begin uploading check files as you issue checks.
  • ACH Positive Pay - Review and make changes to your list of allowed ACH transactions.

corporate o2 mobile experience

The steps to add Corporate O2 Mobile to your mobile device can be found here. 

 
 
 


 


Resources & Materials

Find a location

Branch Map

Find a location near you.

Find an ATM

Allpoint® ATMs

Find a surcharge-free ATM in the Allpoint® Network.

Intuit Instructions

Intuit® Instructions

Intuit® users only - click for conversion instructions.

 


Welcome Guide - Personal Accounts

 
 

O2 Digital Banking User Guide

 

Disclosures - Personal Accounts

 

Welcome Guide - Commercial Accounts

 

Corporate O2 Log In Guide

 

Disclosures - Commercial Accounts

 
 
Apple®, iPad® and App Store® are registered trademarks of Apple, Inc.; Android™ and Google Play™ are trademarks of Google LLC.
Zelle® and the related Zelle® marks are wholly owned by Early Warning Services, LLC and are used herein under license.
Intuit and QuickBooks are trademarks and service marks of Intuit Inc., registered in the United States and other countries.
Allpoint® is a registered trademark of NCR Atleos. "O2" and "Old Second" each refer to Old Second National Bank.