Aoben Cong sent a lawyer's letter to Blockstream's CEO, and Blockstream responded by disregarding it.

According to Coindesk, after Oban was to sue the founder of the Lightning Torch Hodlonaut, Oban was applied to the court for arbitration, in order to self-certify Nakamoto, and sent a lawyer's letter to Blockstream CEO Adam Back. Blockstream COO Samson Mow responded by saying that Adam Back did receive a lawyer's letter requesting a response before April 23, but we would not pay attention.