Contact Us

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Use the dropdown menu below to find the contact information that's most relevant to you.

Contact Information for Acquirers

By Phone

Online

Servicing and Interest

Interested in partnership or have a servicing question? Email us at contactus@discover.com.

Interchange, Rates and Fees

Find the latest Discover® Global Network interchange and cash reimbursement rates and fees for Canada.

Access rates and fees

All other regions, please email us at contactus@discover.com.

Fraud Prevention

Note: When emailing us, please do not share personal, sensitive or confidential information.

Technical Assistance

For help with your Fraud & Risk Center Log In ID and/or Password, email us at globalfraudsolutions@discover.com.

Account Incident Manager (AIM) Application

To get access to Account Incident Manager for Discover Global Network or Diners Club International®, please email a completed application to DNFraud@discover.com or DCIFraud@dinersclub.com.

Download Application

Global Compliance

Please contact us at dfsactivity@discover.com if you detect or witness suspicious activity on or involving Discover® Global Network cards, products, and/or transactions or if you become aware of such activity and have questions.

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Contact Information for Business Owners

By Phone

Online

Servicing and Interest

Interested in partnership or have a servicing question? Email us at contactus@discover.com.

Fraud Prevention

Discover® Global Network Acquired Merchants

Contact us at globalfraudsolutions@discover.com.

  • Suspect a transaction is fraudulent or are suspicious of the customer
  • Need help with your Fraud & Risk Center login ID and/or password

Note: When emailing us, please do not share personal, sensitive or confidential information.

Third-Party Acquired Merchants

Please contact your processor directly for assistance. Click here for a list of processors.

Data Security

To report data compromise or cardholder data breach, or if you have questions on security or PCI compliance, please email AskDataSecurity@discover.com.

Order Free Signage

Order complimentary signage and much more.

Order Online
Surcharge Notification

Merchants who intend to add a surcharge to Discover transactions must provide notice directly to Discover and the merchant's acquirer 30 days before beginning the surcharge.

Submit your notification
Accept Discover Global Network

Check Your POS Terminal

Chances are, your in-store terminal is ready to accept cards on our network. Check it for yourself in minutes.

Test Your Terminal

Contact a Bank or Processor

To start accepting in store or online, contact your payment processor or find one from our list.

Find an Acquirer

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Contact Information for Issuers

By Phone

Online

Servicing and Interest

Interested in partnership or have a servicing question? Email us at contactus@discover.com.

Fraud Prevention
Technical Assistance

For help with your Fraud & Risk Center Log In ID and/or Password please email globalfraudsolutions@discover.com.

Note: When emailing us, please do not share personal, sensitive or confidential information.

Account Incident Manager (AIM) Application

To get access to Account Incident Manager for Discover® Global Network or Diners Club International®, please email a completed application to DNFraud@discover.com or DCIFraud@dinersclub.com.

Download Application

ProtectBuy

To request more information email protectbuy@discover.com

Data Security

Data Compromise

Call Discover® Global Network Security at 1-800-347-3083 to report a data security breach, within 48 hours of incident.

PCI Compliance

If you have questions on security or PCI compliance, please email AskDataSecurity@discover.com

Global Compliance

Please contact us at dfsactivity@discover.com if you detect or witness suspicious activity on or involving Discover® Global Network cards, products, and/or transactions or if you become aware of such activity and have questions.

Merchant Referral Form

Fill out a merchant referral to report issues around acceptance or cardholder experience.

Get Started >

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Contact Information for Networks

By Phone

Online

Servicing and Interest

Interested in partnership or have a servicing question? Email us at contactus@discover.com.

Fraud Prevention

ProtectBuy

To request more information email protectbuy@discover.com

Global Compliance

Please contact us at dfsactivity@discover.com if you detect or witness suspicious activity on or involving Discover® Global Network cards, products, and/or transactions or if you become aware of such activity and have questions.

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(Letters are case sensitive)

Contact Information for Payment Service Providers

By Phone

Online

Servicing and Interest

Interested in partnership or have a servicing question? Email us at contactus@discover.com.

PCI Compliance

If you have a specific question about the Discover Information Security & Compliance program or our compliance validation and reporting recommendations, please direct your questions to askdatasecurity@discover.com.

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