Thomas Antonsson, Member
@tomtom5
The easiest way you can reach the Capital One Quicksilver customer service is either online or through the issuer’s mobile app. Alternatively, you can contact them over the phone at (800) 227-4825 or via mail.
To contact them online, either log in to your account at Capitalone.com or to the Capital One app. If you prefer to call, just dial (800) 227-4825 and you will be able to talk to a representative. If you choose to contact them by mail, the address is:
Capital One
Attn: General Correspondence
P.O. Box 30285
Salt Lake City, UT 84130-0287
Reaching the Capital One Quicksilver customer service via mail will take the longest. Still, if you choose to do it, you should include your card number in your inquiry, for faster processing.

Capital One Quicksilver Cash Rewards Credit Card
People also ask
Did we answer your question?