Satoshi Nakamoto’s final known private communications took place over two emails in April 2011.
April 23, 2011 — to Mike Hearn
Satoshi wrote to Mike Hearn, a Google engineer who had been corresponding with him since April 2009:
Quote from: Satoshi Nakamoto on April 23, 2011, 3:40:00 PM UTC“I’ve moved on to other things. It’s in good hands with Gavin and everyone.”
He also expressed hope that Hearn’s BitcoinJ project would continue to be developed as an alternative client.
April 26, 2011 — to Gavin Andresen
Three days later, Satoshi sent what is believed to be his absolute final email, addressed to Gavin Andresen with the subject line “alert key.” He wrote:
Quote from: Satoshi Nakamoto on April 26, 2011, 10:29:00 AM UTC“I wish you wouldn’t keep talking about me as a mysterious shadowy figure, the press just turns that into a pirate currency angle. Maybe instead make it about the open source project and give more credit to your dev contributors; it helps motivate them.”
He then announced his departure:
“I’ve moved on to other things and will probably be unavailable.”
Finally, he transferred the network alert key — a critical tool for broadcasting emergency messages to all Bitcoin clients — completing the last piece of the project handover.
Andresen replied, accepting the alert key and disclosing that he had been invited by In-Q-Tel to present Bitcoin at a CIA conference. Satoshi never replied. No verified communication from Satoshi has been recorded since.
This farewell pair functions as a documentary endpoint in several later readings. The genesis block entry reads it as the closing bookend to the Times headline opening — the moment that completes the arc Satoshi began on January 3, 2009. The identification-asymmetry analysis treats the silence after these emails as evidence of design rather than absence, and the Satoshi-design-vs-current-reality analysis marks April 26, 2011 as the calendar boundary on which the post-Satoshi era begins. The first codebase change after the handover, recorded in the 2011-11-20 Bitcoin v0.5 Crypto++-removal entry, is read against this date to establish that successor maintainers waited seven months before touching the cryptographic core. The digital-gold structural-features analysis goes further and treats the founder’s documented departure as itself a load-bearing property of the asset — a feature that distinguishes Bitcoin from later cryptocurrencies whose creators remained reachable.