i have been using the jerm for sometime and carding for awhile but now as technology gets better i have to try to educate myself more ... i notice alot of us carders using canada dumps but for me they never ever work only canada amex as i was playing with the jerm i noticed in settings you can change the dpi for the tracks as well as the parity and bits.. and also it has the iso format the amvmma format and the old ca... now i know the amvmma or whatever is for id and iso for normal cards i assume old ca is canada ... if this is so will the us pos accept the old canada format and auth the card if its canada dump.. if not then whats the new canada format so i can buy canada dumps.. or can someone break down how the dpi and parity work because sometimes i can still get a dump in target to work but not because of name ... because we have taken exact dump to target a copy from real card and tried it and it wont work my assumption is they are reading the dpi or the parity and its not matching because i read the real card and wrote the other and still no luck so it has to be something else in track .... this is the million dollar question i suppose