FlyerTalk Forums - View Single Post - Stacking RUs from different years
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Old Jul 22, 2022, 12:22 am
  #4  
LyingFlat
 
Join Date: Jul 2014
Location: Auckland
Programs: NZ Elite, IHG Diamond Ambassador
Posts: 908
Originally Posted by sbiddle
So I assume that record can only be created once and then not subsequently modified which also prevents somebody from double dipping and say lodging an APD upgrade and then later trying to add a RU to it?
Yes, that's right. A CERT can't be modified. Only deleted and re-entered.

As soon as the upgrade is requested, the CERT is created which also creates a record in the member's AP account. If another upgrade is requested for the same sector, the system will reject it as a CERT already exists. The only way around this is to delete the CERT and have a new one applied. In the case of a Silver member, this still won't allow stacking as the recognition upgrades need to be available in the AP account for a CERT to be created.

Essentially, the process is:

1. Member requests an upgrade
2. Carina validates the request against the AP account
3. If the requisite points/recognition upgrades are available, a SSRCERT is created in the PNR against the relevant sector
4. The points/recognition upgrades are removed from the AP account with a record of the CERT number and service class requested
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