Śrīla Prabhupāda ordered that after his departure not a word of his books should be changed.

There is no reliable evidence that such an order was ever given.

• The Folio VedaBase gives no record of it.
• None of his editors (who’d be the natural ones to receive such an order) recall having heard it, nor any of his secretaries.
• No one has ever said when, where, or to whom the supposed order was given.

Though the story often appears on the internet, no evidence has ever been produced for it. In short, the story appears inauthentic.