Later Early to Middle/early-late Interplanetary Age practice organized by criminal gangs and shady dealers, usually operating out of fly-by-night virchsites, data havens, and hastily rented and abandoned office modules. A family, collective, or individual would be offered a lucrative claim on an asteroid or piece of real estate. Upon arriving, they would discover that their claim was part of of rock belonging to someone else. The authorities did their best to stamp out the practice, but no sooner would they shut down one than two more would spring up elsewhere. Doubleclaiming declined and disappeared during the late Interplanetary period, due less to the authority's use of increasingly skillful "hunter-searcher" autonomous programs as to the fact that most real estate was already bought up, and friendly dedicated ai helpers meant that ownership could be easily be checked by even the most InterPlanetNet illiterate.