[zangetsuBankai]

well thats all good but if we remember correctly yourichi came into the central 46 chamber and busted urahara & tenssai out so even though his punishment was 2 b banished on earth i dont think it was ever officially carried out so maybe by some kind of technicality hes like a pending case so thats y theyre able 2 keep contact with him or or maybe their are no rule saying that shinigami cant communicate with exile members of SS as long as its outside of where that person was banished thus he serves as sort a safe house 4 shinigami on earth ....well those who know 2 seek him