For a limited tome you will receive double the amount of avios at Iberia Plus for each bookingg at an Accor hotel.
Collect X2 Avios for each Accor stay.
Stay from 01/10/19 until 31/12/19
and book from 01/10/19 to 31/10/19.
Link to the promotion.
The only thing you have to to is activate the automatic points conversion to Iberia Plus.