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No. Priority Mail Flat Rate packaging is designed for Priority Mail service. If you try to apply it to a different service, you may run into rating or label errors. ShipStation helps by keeping package choices tied to the correct service.
No. Priority Mail Flat Rate packaging is designed for Priority Mail service. If you try to apply it to a different service, you may run into rating or label errors. ShipStation helps by keeping package choices tied to the correct service.