Stablecoin payment chargebacks? There are none.

On the card rail, every transaction carries reversal risk for the merchant. Visa and Mastercard chargeback windows run 60 days from the transaction date for standard disputes and up to 120 days for goods-not-received or quality claims. American Express extends to 120 days as a baseline. ACH has its own parallel: NACHA rules let a consumer reverse an unauthorized debit for 60 days (24 hours for businesses). During those windows, a confirmed payment is provisional, not final. High-risk merchants compound this with the operational tax that follows: dispute response queues, evidence documents, $15-100 per-dispute fees, late-night arbitration deadlines, and rolling reserves of 5-15% of monthly volume held for 6+ months as chargeback insurance. When a reserve gets unexpectedly extended or a processor terminates the account at a chargeback ratio breach, the cash-flow shock can take months to unwind. Stablecoin payment chargebacks don't carry the same tax, because the category doesn't exist on the rail at all.

Stablecoin payment chargebacks aren't lower than card chargebacks, or better-managed, or insured against. They're structurally absent. Once an on-chain USDC or USDT transfer is included in a confirmed block, no card network, no issuing bank, no processor, and no PYMSTR operator has the technical ability to reverse it. The finality is a protocol property, not a policy commitment. This matters because policy-level "no chargebacks" promises can be revoked by the entity making them (a custodian can decide to claw back, an issuer can re-authorize); a protocol-level guarantee cannot. The distinction also surfaces an important nuance: refunds and reversals are not the same thing. A refund is a NEW transaction the merchant chooses to initiate (you can send stablecoins back to the customer's wallet at any time, and you control whether to do so). A reversal is a transaction the customer or their bank forces against the merchant's will. On the stablecoin rail, refunds are available; reversals are not. The trade-off is honest: zero-chargeback finality means PYMSTR is not a buyer-protection layer. Use it where finality is appropriate, the way you'd use a bank transfer.