TrackingId Property
User-generated unique tracking number.
Syntax
[VB.NET] Public Property TrackingId As String
[C#] public string TrackingId {get; set;}
Remarks
You can use this property to specify your own unique tracking ID, and later use this value to obtain information about a payment or to request a refund. The TrackingId is provided as a convenience in cases when you already maintain an ID that you want to associate with a payment. You can also track and make changes to payments using the PaymentKey.
Note: You are responsible for ensuring that the TrackingId is unique
Specify the payment you're interested in using either the PaymentKey, TransactionId, or TrackingId. It is not recommended to specify more than one of these properties, unless they identify the same payment. If the properties do not belong to the same payment, the TransactionId is used; next, PayPal uses the PaymentKey. If more than one of these is specified, the TrackingId is never used.
Default Value
""