OK, I'll try again for you. At the risk of boring you/others (because, of course, the relevant details about challenges are in the relevant sticky) IMHO, registering for AA300 & AA400 might be a problem if one didn't know what they were because ...

As I understand AA's challenge rules, one is not supposed to be able to:

A ... register for both challenges at the same time. I do realise various people have managed to do so successfully in the past.

B ... do each challenge more than once. I'm not sure that rule has been confirmed one way or t'other, hence my asking ExecDeskRep for the definitive answer on that issue.

I, for example, wouldn't want to register for either code because I'm doing the Gold challenge right now and need to do them separately - I rarely fly for work and can't afford to fly enough to do the Plat at the moment. Plus, I would want do that one in the second half of a year anyway.

Since AA doesn't send out any challenge confirmation, or rules, etc, if you didn't know what you'd signed up for and didn't fly enough during the requisite 90 days/3 months, then you've failed one, or both, of the challenges without realising.

Hope that clarifies my concerns for anyone who registered those two codes without knowing what's what.

All the best,