In most cases, you should try to fight chargebacks. However, it's best to not dispute valid chargebacks. Sometimes the product doesn't get delivered or is damaged by shipping, in which case a chargeback is valid.If that isn't the case, the chargeback may be illegitimate. Not fighting illegitimate chargebacks can lead to your business being targeted by fraudsters and an increase in its chargeback ratio, the latter of which may result in the termination of your merchant account.