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Created by Denelle D ( ) on 2011-09-01 07:37:03 Back to Topics


We would appreciate IATA confirmation that it is acceptable to deliver a Net Fare in the coupon value field and a positive VAT corresponding to this field. Our understanding is that validation will not fail in that SIS does not assume that VAT cannot be added to the coupon value but must always be subtracted.
Replied by Ashley H on 2011-09-19 10:09:52

Dear Denelle,


SIS does not make any assumption on the sign value of the amount field. SIS expects its members to specify what the sign value is for each and every amount field. So if there is a positive Net Fare and a positive VAT on a coupon, both these amounts should be reported with a Plus sign. While validating the Total coupon amount SIS takes a sum of all amount fields reported at the coupon level along with the individual sign fields and checks if the derived total value matches with the total value reported in the input file.


Best regards,



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