Multicolor　luminescent　materials　hold　great　potential　in　high-level　optical　anticounterfeiting　and　encryption　technologies.　However,　achieving　multiple　luminescence　in　a　single　phosphor　with　a　single　dopant,　especially　covering　visible　and　invisible　regions　simultaneously,　remains　a　standing　challenge.　Herein,　we　successfully　realize　a　visible　and　invisible　dual-band　emission　in　single-doped　gamma-AlON:Mn2+　phosphors.　Under　450　nm　light　excitation,　the　low-doped　gamma-AlON:xMn2+　phosphors　(x　＜=　0.02)　emit　a　single　narrowband　green　emission　at　515　nm;　however,　when　further　increasing　Mn2+　concentration,　the　heavy-doped　gamma-AlON:xMn2+　(x　＞=　0.05)　samples　display　an　additional　broad　near-infrared　emission　band　peaking　at　730　nm.　Such　an　intriguing　dual-band　luminescence　spanning　from　visible　to　invisible　regimes　is　assigned　to　the　combined　emissions　of　isolated　tetrahedral　Mn2+　ions　and　superexchange-coupled　Mn2+-Mn2+　pairs　in　gamma-AlON　host.　Exploiting　the　distinct　photoluminescence　in　low-　and　high-doped　gamma-AlON:Mn2+　phosphors,　we　further　realize　a　double-level　optical　anticounterfeiting　and　information　encryption　demonstration.　This　work　first　presents　the　green　and　near-infrared　dual-emission　in　gamma-AlON:Mn2+　phosphors,　not　only　enabling　high-level　optical　anticounterfeiting　and　encryption　but　also　shedding　light　on　luminescence　tuning　in　inorganic　phosphors.