The “redshift controversy” can be said to have originated from studies of pairs and compact groups. There are two potential problems involving the measured redshifts of galaxies in interacting systems: 1) the question of the physical association of galaxies in pairs and groups with discordant (ΔV0 ≥103 kms-1 redshift and 2) the possible quantization of redshifts in samples of pairs regarded (on the basis of redshift difference) as physical. The emphasis in the panel discussion was on the latter problem.