The cryptown user, Jordan Spencer, received a letter from his bank warning him that his account would be closed if he continued to buy and sell cryptocurrencies through the Coinbase site.
Bank "Lakestone Bank & Trust" warned that its account will be monitored and, if such transactions continue, the account will be closed.
Spencer published the letter to a Facebook group for Ethereum dealers to warn others of the possible fines or sanctions.
"We are happy to have you as a customer at Lakestone Bank & Trust and would like to fulfill your banking needs but it has come to my attention that you are making purchases and recieving funds from Coinbase.com - a type of business transaction that is against Lakestone's policies and will need to be discontinued immediately.
We will continue to monitor your account and if we see that these types of transactions continue, we will be forced to take other actions, including closing down the bank account, "the bank wrote.