Originally Posted by Tdgraves

This IS correct.

Originally Posted by Prospero

If you are travelling in a cabin higher than the original ticketed class, the number of Avios and Tier Points awarded for that flight does vary, depending on the circumstances of the upgrade. Here are some common upgrade examples and what you should expect to earn for each category:

• If you upgrade your ticket using Avios (UuA / MFU) then you get the Tier Points and Avios of the purchased ticket, so if you upgrade a World Traveller Plus ticket to Club World, you get the World Traveller Plus Tier Points and Avios.
• If you purchase an upgrade - either through Manage My Booking or at the airport, you will get the higher level of Tier Points. So going from World Traveller Plus to Club World, you would get the Club World Avios and Tier Points.
• If you receive an operational upgrade, you don't get the extra Tier Points and Avios of the upgraded sector, just those in accordance with the paid class of service.
• If you pay for an upgrade, and then get a further operational upgrade (e.g. World Traveller Plus to Club World to FIRST), you should receive the paid for Tier Points and Avios (here Club World).
• If you receive an operational upgrade and then pay for a further upgrade, you should only get the initial ticket level, in the above example World Traveller Plus Avios and Tier Points, but there are reports of passengers actually getting First Tier Points and Avios.
• If the upgrade is with a oneworld airline the same principles apply, however there are reports of AA not always granting these upgrades.