The　incorporation　of　lanthanide　ions　(Ln(3+))　has　been　shown　to　be　an　effective　strategy　to　tune　the　luminescence　properties　in　lead-free　halide　double　perovskites.　However,　most　Ln(3+)-doped　double　perovskites　exhibit　a　low　luminescence　efficiency　and　a　high　excitation　energy　and/or　require　doping　with　multiple　ions　which　result　in　complex　compositions.　Herein,　we　demonstrate　that　the　Ln(3+)　doping　(Ln　=　Yb,　Er,　Nd)　in　the　layered　double　perovskite　Cs4MnBi2Cl12　enables　multimodal　luminescence,　that　is,　the　orange-red　emission　from　the　d-d　transition　of　Mn2+,　the　efficient　ultraviolet　light　excited　near-infrared　(NIR)　emissions　of　Ln(3+)　and　the　upconversion　emissions　in　both　Yb-　and　Yb/Er-doped　systems.　In　addition,　the　NIR　emissions　of　Ln(3+)　can　also　be　excited　by　blue　and　green　light　benefiting　from　the　energy　transfer　from　Mn2+　to　Ln(3+).　Finally,　taking　advantage　of　the　multimodal　luminescence　in　the　Ln(3+)-doped　Cs4MnBi2Cl12　phosphor,　a　preliminary　anti-counterfeiting　application　is　demonstrated.　We　highlight　that　the　particular　chemical　composition　(comprising　Bi3+　and　Mn2+)　and　the　sandwich-type　Bi-Mn-Bi　layered　crystal　structure　facilitate　the　light　absorption　and　the　energy　transfer　from　Bi3+　to　Ln(3+)　and　Mn2+　to　Ln(3+),　demonstrating　the　importance　of　the　rational　selection　and　design　of　double　perovskite　host　materials　for　Ln(3+)　doping.