We report μSR data from pseudo-cubic and layered copper fluorides, KCuF 3 , K 2 CuF 4 , and its substitutions K 1 . 9 Sr 0 . 1 CuF 4 , K 2 CuF 3 . 9 O 0 . 1 , K 2 Cu 1 . 8 Zn 0 . 2 F 4 . In KCuF 3 , the extinction of the F-Mu-F fraction and its progressive replacement by a magnetic fraction between 40 and 35K demonstrate a first-order magnetic transition at T N , probably driven by orbital degrees of freedom. The layered compounds exhibit on the contrary conventional second-order transitions at T c =6.25K, independent of electron or hole doping up to at least x=0.1. However, 20% substitution of Cu with non-magnetic Zn completely suppresses long-range magnetic order above 1.3K.