A unique identifier for an eBay order line item. This field is created as soon as there is a commitment to buy from the seller, and its value is based upon the concatenation of ItemID and TransactionID, with a hyphen in between these two IDs. OrderLineItemID can be used in the input instead of an ItemID/TransactionID pair to identify an order line item.
Notes can only be added to order line items that are currently being tracked in My eBay. Buyers can view user notes made on order line items in the PrivateNotes field of the WonList container in GetMyeBayBuying, and sellers can view user notes made on order line items in the PrivateNotes field of the SoldList and DeletedFromSoldList containers in GetMyeBaySellinging.
See the
Field Index to learn which calls use OrderLineItemID.