For Chase, I found you can send a Secure Message and attach documents instead of faxing. So it's a little easier.
Originally Posted by
Majuki
That depends on the card issuer. Filing disputes is typically a manual process since the common cases would be things like disputing fraudulent transactions or a merchant billing error. Presumably these things wouldn't happen to you often, and the card issuer wants to collect as much information as possible when investigating the dispute. Also, the infrastructure for the dispute process was established long before the time of online banking or even DCC.