Disclosed is an example of a registration assembly for a media processing device, including a registration surface. The registration assembly including a bias member coupled to the registration surface to bias the registration surface toward the media processing path to apply a force to a media unit. The registration assembly including an activator coupled to a roller, the roller to be driven via contact with the media unit. The activator configured to move the registration surface toward the media processing path into the active position to engage the media unit responsive to rotation of the roller in the first rotational direction. The activator configured to move the registration surface away from the media processing path into an inactive position responsive to rotation of the roller in the second rotational direction.