{"templateId":"markdown","sharedDataIds":{"sidebar":"sidebar-sidebars.yaml"},"props":{"metadata":{"markdoc":{"tagList":[]},"type":"markdown"},"seo":{"title":"Modification and rebooking","meta":[{"name":"robots","content":"noindex"}],"llmstxt":{"hide":false,"sections":[{"title":"Table of contents","includeFiles":["**/*"],"excludeFiles":[]}],"excludeFiles":[]}},"dynamicMarkdocComponents":[],"compilationErrors":[],"ast":{"$$mdtype":"Tag","name":"article","attributes":{},"children":[{"$$mdtype":"Tag","name":"Heading","attributes":{"level":1,"id":"modification-and-rebooking","__idx":0},"children":["Modification and rebooking"]},{"$$mdtype":"Tag","name":"p","attributes":{},"children":["These operations cover changes to an active car rental booking."," ","Modifications such as pickup or drop-off date and time, location, vehicle type, rate, and rebooking to a different supplier are covered in these operations."]},{"$$mdtype":"Tag","name":"p","attributes":{},"children":[{"$$mdtype":"Tag","name":"strong","attributes":{},"children":["Webhook used:"]}," ",{"$$mdtype":"Tag","name":"a","attributes":{"href":"/openapi/webhookeventapi/webhooks/paths/pnr_v3/post"},"children":["PNR_V3"]}]},{"$$mdtype":"Tag","name":"div","attributes":{"className":"md-table-wrapper"},"children":[{"$$mdtype":"Tag","name":"table","attributes":{"className":"md"},"children":[{"$$mdtype":"Tag","name":"thead","attributes":{},"children":[{"$$mdtype":"Tag","name":"tr","attributes":{},"children":[{"$$mdtype":"Tag","name":"th","attributes":{"data-label":"Step"},"children":["Step"]},{"$$mdtype":"Tag","name":"th","attributes":{"data-label":"Operation"},"children":["Operation"]},{"$$mdtype":"Tag","name":"th","attributes":{"width":"25%","data-label":"Event trigger"},"children":["Event trigger "]},{"$$mdtype":"Tag","name":"th","attributes":{"data-label":"Context"},"children":["Context"]}]}]},{"$$mdtype":"Tag","name":"tbody","attributes":{},"children":[{"$$mdtype":"Tag","name":"tr","attributes":{},"children":[{"$$mdtype":"Tag","name":"td","attributes":{},"children":["1"]},{"$$mdtype":"Tag","name":"td","attributes":{},"children":[{"$$mdtype":"Tag","name":"code","attributes":{},"children":["BOOKING_UPDATED"]}]},{"$$mdtype":"Tag","name":"td","attributes":{},"children":["When the car booking is modified and the same PNR is updated."]},{"$$mdtype":"Tag","name":"td","attributes":{},"children":["A change has been made to the car reservation that is not a cancellation or rebooking."," ","This event type covers all car modifications, including pickup or drop-off date and time changes, pickup or drop-off location changes,"," ","vehicle (car type) changes, number of cars changed, loyalty number updates, and total booking amount changes."," ",{"$$mdtype":"Tag","name":"br","attributes":{},"children":[]},{"$$mdtype":"Tag","name":"br","attributes":{},"children":[]},"If a supplier decides to cancel and rebook for a modification then the ",{"$$mdtype":"Tag","name":"code","attributes":{},"children":["BOOKING_UPDATED"]}," event will not be sent."," ","Instead, you'll receive a ",{"$$mdtype":"Tag","name":"code","attributes":{},"children":["BOOKING_CANCELED_BY_TRAVELER"]}," followed by a ",{"$$mdtype":"Tag","name":"code","attributes":{},"children":["BOOKING_CREATED"]}," event."," ","Use the ",{"$$mdtype":"Tag","name":"code","attributes":{},"children":["carPnr > rebookReference"]}," object in the ",{"$$mdtype":"Tag","name":"code","attributes":{},"children":["BOOKING_CREATED"]}," event payload to see the cancelled PNR."," ",{"$$mdtype":"Tag","name":"br","attributes":{},"children":[]},{"$$mdtype":"Tag","name":"br","attributes":{},"children":[]},{"$$mdtype":"Tag","name":"strong","attributes":{},"children":["Example 1:"]}," A traveler extends their rental by one day (drop-off moves from March 18 to March 19)."," ","The ",{"$$mdtype":"Tag","name":"code","attributes":{},"children":["BOOKING_UPDATED"]}," event is triggered on the same PNR with the updated dates and new total ($220)."," ",{"$$mdtype":"Tag","name":"br","attributes":{},"children":[]},{"$$mdtype":"Tag","name":"br","attributes":{},"children":[]},{"$$mdtype":"Tag","name":"strong","attributes":{},"children":["Example 2:"]}," A traveler changes the pickup location from the airport to a downtown branch. The supplier cancels and rebooks the reservation with new information."," ","A ",{"$$mdtype":"Tag","name":"code","attributes":{},"children":["BOOKING_CANCELED_BY_TRAVELER"]}," event is triggered for the original PNR,"," ","followed by a ",{"$$mdtype":"Tag","name":"code","attributes":{},"children":["BOOKING_CREATED"]}," event for the new PNR with the updated location."," ",{"$$mdtype":"Tag","name":"br","attributes":{},"children":[]},{"$$mdtype":"Tag","name":"br","attributes":{},"children":[]},{"$$mdtype":"Tag","name":"strong","attributes":{},"children":["Example 3 (Loyalty added):"]}," A traveler adds their Hertz Gold Plus Rewards membership number to the booking."," ","The ",{"$$mdtype":"Tag","name":"code","attributes":{},"children":["BOOKING_UPDATED"]}," event is triggered."]}]},{"$$mdtype":"Tag","name":"tr","attributes":{},"children":[{"$$mdtype":"Tag","name":"td","attributes":{},"children":[{"$$mdtype":"Tag","name":"p","attributes":{},"children":["2"]}]},{"$$mdtype":"Tag","name":"td","attributes":{},"children":[{"$$mdtype":"Tag","name":"p","attributes":{},"children":[{"$$mdtype":"Tag","name":"code","attributes":{},"children":["BOOKING_REBOOKED"]}]}]},{"$$mdtype":"Tag","name":"td","attributes":{},"children":[{"$$mdtype":"Tag","name":"p","attributes":{},"children":["When the car booking is rebooked to a different supplier or vehicle."]}]},{"$$mdtype":"Tag","name":"td","attributes":{},"children":[{"$$mdtype":"Tag","name":"p","attributes":{},"children":["The car reservation has been rebooked. This indicates the vendor confirmation number has changed."]},{"$$mdtype":"Tag","name":"blockquote","attributes":{},"children":[{"$$mdtype":"Tag","name":"p","attributes":{},"children":["Note: This is distinct from ",{"$$mdtype":"Tag","name":"code","attributes":{},"children":["BOOKING_UPDATED"]},", which covers modifications to the same reservation."]}]},{"$$mdtype":"Tag","name":"p","attributes":{},"children":["Rebooking can occur when a better rate becomes available for an equivalent vehicle and an agent or traveler manually rebooks to a different supplier."," ","The ",{"$$mdtype":"Tag","name":"code","attributes":{},"children":["rebookReference"]}," object in the payload links the old and new PNRs and may include additional metadata about the rebook."," ","To identify a rebook, compare the ",{"$$mdtype":"Tag","name":"code","attributes":{},"children":["vendorConfirmationNumber"]}," between the latest and previous PNR versions."," ","If they differ, the booking has been rebooked. You can also check the ",{"$$mdtype":"Tag","name":"code","attributes":{},"children":["rebookReference"]}," object for cancelled PNR IDs and the new rebooked PNR ID."," ",{"$$mdtype":"Tag","name":"br","attributes":{},"children":[]},{"$$mdtype":"Tag","name":"br","attributes":{},"children":[]},{"$$mdtype":"Tag","name":"strong","attributes":{},"children":["Example:"]}," A traveler booked a car at $55/day with Hertz. A lower rate of $45/day becomes available for an equivalent car with Avis."," ","The TMC agent identifies this as a cost-saving measure and rebooks at the better rate, saving $30 over 3 days."," ","The ",{"$$mdtype":"Tag","name":"code","attributes":{},"children":["BOOKING_REBOOKED"]}," event is triggered with a new confirmation number."]}]}]}]}]}]},{"$$mdtype":"Tag","name":"Heading","attributes":{"level":2,"id":"modification-and-rebooking-flow-diagram","__idx":1},"children":["Modification and rebooking flow diagram"]},{"$$mdtype":"Tag","name":"Mermaid","attributes":{"data-language":"mermaid","diagramSource":"flowchart LR\n subgraph modifications[\"Modifications and rebook\"]\n A([\"Confirmed car
booking\"]) --> B{\"Type of
change?\"}\n\n B -->|\"Modifying same PNR\"| C[\"BOOKING_UPDATED
―――――――――――
Dates, locations, car type,
rate, or loyalty changed
on the same PNR.\"]\n\n B -->|\"Cancel and rebook\"| D[\"BOOKING_CANCELED_
BY_TRAVELER
―――――――――――
Old PNR cancelled
as part of modify flow.\"]\n D --> E[\"BOOKING_CREATED
―――――――――――
New PNR created with
updated details.\"]\n\n B -->|\"Manual rebook
(better rate)\"| F[\"BOOKING_REBOOKED
―――――――――――
The confirmation number or supplier is changed.\"]\n end\n\n style A fill:#f0f0f0,stroke:#999\n style C fill:#2196F3,color:#fff\n style D fill:#F44336,color:#fff\n style E fill:#4CAF50,color:#fff\n style F fill:#2196F3,color:#fff\n","diagramHtml":"

Modifications and rebook

Modifying same PNR

Cancel and rebook

Manual rebook
(better rate)

Confirmed car
booking

Type of
change?

BOOKING_UPDATED
―――――――――――
Dates, locations, car type,
rate, or loyalty changed
on the same PNR.

BOOKING_CANCELED_
BY_TRAVELER
―――――――――――
Old PNR cancelled
as part of modify flow.

BOOKING_CREATED
―――――――――――
New PNR created with
updated details.

BOOKING_REBOOKED
―――――――――――
The confirmation number or supplier is changed.

"},"children":["flowchart LR\n subgraph modifications[\"Modifications and rebook\"]\n A([\"Confirmed car
booking\"]) --> B{\"Type of
change?\"}\n\n B -->|\"Modifying same PNR\"| C[\"BOOKING_UPDATED
―――――――――――
Dates, locations, car type,
rate, or loyalty changed
on the same PNR.\"]\n\n B -->|\"Cancel and rebook\"| D[\"BOOKING_CANCELED_
BY_TRAVELER
―――――――――――
Old PNR cancelled
as part of modify flow.\"]\n D --> E[\"BOOKING_CREATED
―――――――――――
New PNR created with
updated details.\"]\n\n B -->|\"Manual rebook
(better rate)\"| F[\"BOOKING_REBOOKED
―――――――――――
The confirmation number or supplier is changed.\"]\n end\n\n style A fill:#f0f0f0,stroke:#999\n style C fill:#2196F3,color:#fff\n style D fill:#F44336,color:#fff\n style E fill:#4CAF50,color:#fff\n style F fill:#2196F3,color:#fff\n"]}]},"headings":[{"value":"Modification and rebooking","id":"modification-and-rebooking","depth":1},{"value":"Modification and rebooking flow diagram","id":"modification-and-rebooking-flow-diagram","depth":2}],"frontmatter":{"seo":{"title":"Modification and rebooking"}},"lastModified":"2026-06-15T05:22:58.000Z","pagePropGetterError":{"message":"","name":""}},"slug":"/webhooks/booking-lifecycle/car-booking-lifecycle/car-modification-lifecycle","userData":{"isAuthenticated":false,"teams":["anonymous"]},"isPublic":true}