Originally Posted by
antonius66
So to be clear, if I move from Iberia to BA it will show the expiration date for those same miles that they had when in the Iberia account, when they show up in the BA account and I could theoretically then move them back to Iberia? Basically that would just be a way to have them in the BA account because the BA account displays the expiration date and the IB does not?
The mile/avios don't have their exp date per se, it's just the if the account has no earn/burn activity all the avios is purged.
But I now see where you are coming from and I see how you and IB+ line confused each other; hope it makes sense now.