hi if i have a patched unit, i enter rcm mode and then try to load a payload but it fails; when i'll create a new account on my switch will it be banned because i entered rcm mode?
As long as you don't actually boot into the OS from Recovery Mode(RCM) then you're fine. All communications are disabled when in RCM so there is no way Nintendo can detect when a console goes into RCM unless it actually boots into the OS(official or CFW)
That's not 100% true as no one can tell that for sure there may be flags in the lastest fw or none at all that could have a counter for times a console has entered rcm it unlikely but there no sure way of knowing
You cannot write rcm mode. You must write RCM. RCM stands for recovery mode so rcm mode is recovery mode mode. That makes no sense! It is a redundant acronym. It is the same mistake as if you would say PIN number, http protocol or HIV virus.rcm mode