Dispute filed for unauthorized charges starting June 7, 2018 and continuing through September 28th. Total of $7,600.00 in charges. Did our 60 days from June 30th statement and reimbursed all charges through August 31st, a total of $1,660.00. Filed disputes with our processor on transactions over $25. Just got a pre-arb notice from two big Amazon purchases. Items were delivered to cardholders address and a name was given - it is our member's son. I called her and asked if she knew the name (didn't know it was son at that time).
My question is if she drops the disputes for any charges the son did, will I have to go back and reinvestigate the transactions in September that were not reviewed before because they fell outside the 60 days? I think we had two different frauds going on. I think the summer charges were just the kid, but I actually think her card was skimmed/hacked around September 9th and a real group of fraudsters got it (or the kid sold the number).