Terminology

The following table describes the terminology for PayPal Express Checkout.

Table 3

PayPal Express Checkout Terminology

Term	Description
Authorization ID	PayPal parameter that identifies an authorization. More than one authorization ID can be associated with an order. Use for a follow‑on authorization reversal or capture.
Billing Agreement ID	PayPal parameter that identifies a specific billing agreement between you and your customer. Use to perform a reference transaction or to cancel a billing agreement.
Capture ID	PayPal parameter that identifies a capture. Use for a follow-on full or partial refund.
Honor Period	Amount of time after an authorization during which funds are held and guaranteed available. If the honor period expires, the capture could be declined.
Order ID	Transaction identifier created by PayPal and returned to you through CyberSource as a reply in the third API call. Used by CyberSource to initiate an authorization or re-authorization.
Session Token	Identifier that the CyberSource API passes to you. Use to merge the API calls. Has a lifetime of three hours.