Choice of OW programme - need retrospective milage credit
 

Hi,

I am sure both of my questions have been answered before, but I could not find anything using the search function. Thanks very much for your help!

Due to the volcano chaos I flew some AA legs in the US at very short notice and did not subscribe to any OW FF programme in advance.
Does any OW programme allow retrospective credit of flight taken before joining? I seem to remember that bmi was okay with it, but no idea if any OW allows it too.

Also - if there is more than one programme allowing retrospective credit - any recommendation / do any of them status match?

Cheers,
G