Mastercard Reason Code 4855

What is

The cardholder paid but says the goods or services were never delivered or performed.

An order wasn't fulfilled, was lost in shipping, or a service was never performed as paid for.

Tracking and delivery confirmation are the whole case for physical goods; completion proof matters for services.

Tracking/delivery confirmation for goods, or signed completion/service records for services.

Submit tracking/delivery confirmation, or service-completion documentation matched to the order.

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Shipping without tracking, or not documenting service completion with the customer's sign-off.

Always ship with tracking; for services, get a dated completion confirmation from the customer.