ASN & Receiving Key

When retrieving a Receiving, you must supply either the receivingKey or asn parameter.

• If both are supplied, they must both match a single Receiving.
• Supplying only one of the parameters is strongly advised.

LineKey

When item objects are supplied with a line_key string field, those items are uniquely identified and can be referenced by it later — for example, to change expected quantity. Line Key must be unique per receiving.

• line_key is optional. Null or missing values are expected and supported.
• Lines without a line_key can still be updated: they are matched by product and lot. If a product and lot combination are specified multiple times in a single POST request, they are grouped and their quantities summed.
• On update, if exactly one existing line matches a given product and lot, that line is updated.
• If multiple keyless lines share the same product and lot, they cannot be told apart and are replaced as a group, with the request treated as the source of truth.
• Supply a line_key whenever you need to reliably target a specific line — especially when a receiving has more than one line for the same product and lot.