I guess it depends on hotel or chain, but in instances where
my daughter has used points to reserve a room for me, the reservation
is made in her name, paid for by her points, 2 adults in room, and in 'special requests or notes' section, she mentions that 2nd guest in room is me, with my name. No problems whatsover in checking in first or even only me, in Marriott or IHG hotels. The copy of reservation confirmation contains my name somewhere on the document.