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We present CCD UBVI photometric and medium/high resolution spectroscopicobservations obtained in the field of the previously unstudied dissolving opencluster candidates NGC 5385, NGC 2664 and Collinder~21. Our analysis stands onthe discussion of star counts, photometry, radial velocity distribution, andproper motions available from the Tycho~2 catalogue. All the three aggregatesclearly emerge from the mean Galactic field, but, regrettably, the closescrutiny of proper motions and radial velocities reveals that we are not facingany physical group. Instead, what we are looking at are just chance alignmentsof a few bright unrelated stars. Our analysis casts some doubt on the Bica etal. (2001) criterion to look for Possible Open Cluster Remnants. It seemsmandatory to define a better criterion to adopt for further investigations.Comment: 12 pages, 12 eps figures (7, 9 and 11 degraded in resolution),  accepted for publication in Astronomy & Astrophysic

NGC 5385, NGC 2664 and Collinder 21: Three candidate open cluster remnants