Amadeus : How to refund a non-refundable unused e-ticket

Procedure

Tip before you start.
Before the refund process initiation, you need to check that all e-ticket coupons statuses related to the refund are open for use (O).
Also you need to know beforehand:

if ticket can be refunded
the exact amount of fare you wish to refund
all specific tax in detail that will be refunded and all those that will not
if a cancellation penalty applies
if other fees apply (e.g administrative fee)

Scenario: The ticket base fare and the fuel surcharge tax (YQ) are non-refundable. All the other taxes are refundable.

1  Initiate a ‘tax-only’ refund & display the refund record. Enter:

TRF125-5236554055/TAX        by ticket number
-or-
TRF/L6/TAX     from the PNR by ticket FA line (e.g. line 6)

2. Display the refundable taxes panel. Enter:

TRFT

System response:

3. Delete the Non refundable tax. Enter:

TRFU/TX2 delete tax in line 2 (YQ)

System response :

4. Redisplay the refund record. Enter:

TRF

5. Process refund. Enter:

TRFP

System response:

Other updates in a refund record & related entries

Entry	Explanation
TRFU/CM10A	Set cancellation penalty commission as amount e.g. EUR10.00
TRFU/CM3P	Set cancellation penalty commission as percentage e.g. 3%
TRFU/NF100	Set the net amount to be refunded e.g. EUR100.00
TRFU/FPA1250.67	Set the amount to be refunded in a specific form of payment e.g 1 to a specific amount e.g. EUR250.67
TRFU/FP1CASH	Set the form of payment (to be used only for Option 1 or Option 2 issued tickets)
TRFU/RMAUTH BY LOCAL AIRLINE OFFICES	Set a specific free text remark (this information is for internal use as it is not transmitted to the airline)
TRFU/AA0148876	Set a specific airline authorization code (this information is for internal use as it is not transmitted to the airline)
TRFIG	Ignore refund record (nothing will be saved in the record)