This paper looks at why distributed ledger technology—applied to enterprise and permissioned networks—will need to evolve to adapt to an imperfect world where human error, laws and mischief will require more flexibility. It looks at the mixed blessing of the indelible ledger in light of Europe’s “right to be forgotten” laws, recent high-profile cybercurrency thefts and the age-old “fat finger” errors that have brought exponential harm to financial services.