This operation creates an end-of-day manifest (a compilation of information about all shipments) that combines all shipments of the day into a single form or electronic record, depending on the carrier. For USPS®, this manifest is called a SCAN form (Shipment Confirmation Acceptance Notice), which combines all trackable shipments into a single form with a single barcode. When the carrier scans the barcode, all shipments for that barcode receive an Acceptance event from USPS. If the SCAN form includes shipments from multiple different induction postal codes, this operation generates a multi-page form with one bar code per page.
Key Considerations:

• Only shipments with the addToManifest shipment option set to true are eligible for inclusion in the manifest or SCAN form.
• Shipments can be added to the SCAN form by specifying the carrierAccountId.
• To generate a SCAN form for the current day, the Create Manifest request must be issued before 8 p.m. local time. Requests made after 8 p.m. require the next day's date to be specified in the submissionDate field.
• Any eligible shipment not included in a SCAN form by 6 a.m. UTC/GMT the following calendar day will be automatically manifested.
• Shipments, once manifested, cannot be re-manifested.
• To prevent a shipment from being auto-manifested, specify the shipment's dateOfShipment option during creation.
• A single Create Manifest request can include up to 7,000 shipments.
• USPS SCAN forms retrieved through URLs are available for 24 hours after creation.