If you do not recognize a transaction on your account, it is recommended that you first contact the merchant for an explanation or a refund. If you still have a concern after contacting the merchant, or if you suspect fraudulent activity, please contact RCU at 1 (800) 479-7928, so we may assist you.  If you are calling outside of the US, please call us at (707) 545-4000. You may call this number collect.