The White House has issued two advisories to warn that fentanyl and other synthetic opioids are being purchased using major cryptocurrencies.

The advisories were addressed to financial institutions as well as digital payments platforms, and are designed to help them detect and report suspicious transactions.

Warning that the United States “is in the midst of an unparalleled epidemic of addiction and death,” the documents said:

“An analysis of sensitive financial data indicates that domestic illicit drug manufacturers, dealers, and consumers use online payment platforms or CVC to purchase precursor chemicals or completely synthesized narcotics primarily sourced from China.”

White House: Crypto used to pay for foreign drugs

In the context of the documents, CVC refers to “convertible virtual currencies” — particularly Bitcoin (BTC), Bitcoin Cash (BCH), Ethereum (ETH) and Monero (XMR). Explaining how the transactions work, the advisories add:

“Individuals located in the United States search for fentanyl and identify potential websites that may provide the opportunity to purchase illicit drugs online. Foreign representatives will instruct the U.S.-based individual to send payments through CVC, such as bitcoin, bitcoin cash, ethereum, or monero.”

Financial institutions urged to collect crypto data

The advisories also note that “CVC transactions generate a significant variety of information elements that may be extremely useful to law enforcement.”

Financial institutions are being urged to collect these details in case of any suspicion, including “virtual currency wallet addresses, account information, transaction details (including [...] hash), relevant transaction history, available login information (including IP addresses), information obtained from analysis of the customer’s public online profile and communications, mobile device information.”

As Cointelegraph reported last month, Treasury Secretary Steven Mnuchin said his department wants to stop Bitcoin from becoming an “equivalent of Swiss-numbered bank accounts.”

Previously, Mnuchin also stated that he shares President Donald Trump’s concerns that cryptocurrency is being used to finance illicit activity.