Signature confirmation options: USPS, UPS, FedEx
Adult signature, direct signature, and standard options by carrier.
When to use
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International address formatting guidelines
Country‑specific tips to reduce delivery failures.
ReferenceWhat affects shipping price? The full list of factors
Weight, dimensions, zones, surcharges, and address type.
ReferenceResidential vs business addresses: detection and pricing
Why carriers charge differently and how to detect address type.
ReferenceFedEx Additional Handling: rules and thresholds
Know the criteria and prevent extra charges.
ReferenceLength + girth limits by carrier
Avoid oversize fees with precise measurements.
ReferenceShipping zones explained
How carriers define distance-based pricing and what it means for you.