Evidence.
WHAT TO KEEP
Order records Delivery confirmation Payment records Communication with customers and suppliers Verified contact details Records of verification calls
WHY
Chargeback disputes require evidence Fraud reports require detail Disputes require a record of what was agreed
FOR CHARGEBACKS
Your gateway will ask for proof the order was legitimate and delivered.
Without it, you lose.
FOR PAYMENT VERIFICATION
Recording that you verified, when and with whom, protects you if a payment is later disputed.
HOW LONG TO KEEP
Follow your accountant's advice.
Generally several years.
WHERE
Backed up, in more than one place.
WHAT TO ORGANISE
So you can find a specific transaction quickly.
WHAT PEOPLE DISCOVER
That they cannot produce the evidence a dispute requires.
WHAT TO DO ABOUT IT
Decide what you would need, and keep it deliberately.