MUFG Union Bank Customer Service
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Phone number: 1-800-298-6466, 1-800-898-6466 

Hours: Monday-Friday: 7:00 a.m. to 9:00 p.m Saturday: 8:00 a.m. to 5:00 p.m.

Email: Customer@unionbank.com

Website: https://www.unionbank.com

MUFG Union Bank Corporate Office Address
400 California Street San Francisco, CA 94104-1302 United States