What does a 526 error code generally signify in customs processing?

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Grade: Education Subject: Support
What does a 526 error code generally signify in customs processing?
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A 526 error code in customs typically indicates a timeout issue during the communication between the customs system and the airline or carrier's system. It means the customs system requested information about the shipment (like the House Bill of Lading) but didn't receive a response within a specific timeframe. It's often a technical glitch, not necessarily an issue with the shipment itself.