Your carrier invoice,checked line by line.

A carrier invoice lists every parcel with a base charge and a series of adjustments. Most are correct. The errors that cost money repeat across thousands of parcels, which is why they go unnoticed.

• Duplicates: the same tracking number billed twice for one shipment.
• Surcharges that don't apply: address corrections on correct addresses, residential surcharges on business addresses, additional handling on parcels within limits.
• Weight and size: billed dimensions that don't match the parcel you shipped.
• Late deliveries on dated services: a service with a delivery commitment that arrived after it.

Most carriers offer the invoice as a data file (CSV or Excel) in their billing portal. It contains every parcel and every charge on its own line, which makes it easy to sort and match. A PDF works for a few pages; the data file works for a year.

A refund for late delivery only applies to services with a delivery commitment, and only if your contract hasn't waived it. Carriers have at times suspended such guarantees, so confirm what currently applies to your account before you claim. Then compare the committed date with the delivery scan for each parcel.

Billing disputes and refund requests have short windows, usually counted from the invoice or delivery date, and they differ per carrier and contract. Group claims per invoice, list the tracking numbers and the reason, and keep the credit note numbers so you can check they arrive.

Silentleak runs this check and the others like it on redacted exports, recovers what is owed in your name after you approve each claim, and charges only on money that reaches your account. Start a free scan of your own exports, or an estimate from four numbers.

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More guides: Refunds where the item never came back. · Chargebacks you lose without answering. · Failed renewals nobody retried.