Customer Service Numbers
Fifth Third Bank Customer Service
Commercial Support
(800) 488-6773
Fifth Third Bank
Report fraudulent activity or verify transactions
(855) 634-1295
Fifth Third Bank
Commercial Support (Alternate)
(866) 475-0729
Fifth Third Bank
- Call Fifth Third Bank Customer Service at (866) 475-0729
- Press 4 for Credit Card
- Press 1 for Commercial Card
- Follow next desired prompts
- Press 1 for Commercial Card
MasterCard Customer Service
Customer Support
(800) 622-7747
MasterCard
International Customer Support
International Toll-Free Numbers (PDF)
MasterCard
- Call MasterCard Customer Support at (800) 622-7747
- Press 1 for English or press 2 for Spanish
- Press 1 for MasterCard holder
- Press 1 for Specific Account Information
- Enter card number followed by pound (#) key
- Follow next desired prompts
- Press 2 for Lost or Stolen Card or Other
Emergency
- Press 1 to Report Lost or Stolen Card
- Press 1 for Specific Account Information