How do I see the history of an e-ticket in Amadeus (TWH)?

Open the ticket with TWD (or TWD/TKT and the number), then TWH lists every status change with its date and origin. TWD/O* opens the old ticket of an exchange. Changes to the booking itself are in the PNR history (RH).

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When

A coupon status is unexpected (refunded, exchanged, suspended) and you want to know when and by whom it changed — e.g. the client says they did not fly, or a ticket's status changed unexpectedly.

Steps

#	Entry	What it does	Why
1	`TWD` or `TWD/TKT…`	Displays the e-ticket record.	Needed first.
2	`TWH`	History of that record.	Every status change with date and origin.
3	`TWD/O*`	The old ticket of an exchange.	Follow a reissue chain.

Check it worked

The history lists each event (issue, status changes) in order.

Traps

History is on the ticket; changes to the booking are in the PNR history (PNR history (RH) — who changed what, and when).
An airline can change coupon statuses itself (involuntary changes, airport control).

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