Originally Posted by
sokolov
Myself, I just use A3 M&B all the time, and then I retro credit non-earning sectors to M&M. I assume that would work with Aeroplan as well, but I've never tried.
This works for me too when flying for example LH K-class (zero earning on A3). I put my A3 number on during check-in, use all the *G benefits etc. and 2 weeks later retro-claim to Eurobonus. I have done it maybe 5 times and every time successfully.