Strange. My approach does not include anything at checkout. I give both cards at check-in. I ask for the room to go on my Amex and incidentals on my visa. I then make sure to have an incidental charged to my room.

My receipt at checkout shows both cards with a very small charge to my visa. A few days later I see the stays on the promotions page.

I'm trying to get the 50,000 points for about $30 worth of snack purchases.

Saturday I'm staying on a certificate. I'm wondering if I can get that stay to count too? I'll be checking in with my visa since it is personal, but no charge for the room. I'm crossing my fingers that night counts too.