United Kingdom-based cryptocurrency exchange CEX.IO now requires its users to disclose their identities, according to a company blog post published Tuesday, Dec. 11.

The new policy was announced in November and has come into force on Dec. 11. From now on, new and previously unregistered users will have to prove their identity. In addition, they can also provide their home address in order to use the full range of CEX.IO options. Customers will be able to skip the mandatory registration only twice, and then must choose between passing the verification process or withdrawing their funds.

Previously CEX.IO also had a Know Your Customer (KYC) policy, but the verification was not obligatory. According to a blog post from June 2015, customers might prove their identities to unlock additional features, such as extending their card payment limits up to $30,000, using bank transfers and withdrawing up to $10,000 daily and $100,000 monthly.

Established in 2013, CEX is a London-based cryptocurrency trading platform, initially started as a cloud mining provider. Currently, the exchange supports eight major digital currencies and four major fiat currencies, while its adjusted daily trading volume is around $4.9 million, according to CoinMarketCap.

While the situation with Brexit — the scenario in which the U.K. leaves European Union — remains cloudy, CEX.IO does business with clients internationally and therefore aims to comply with relevant international regulations, including the EU’s Fifth Anti-Money Laundering (AML) Directive. The directive entered into force in July 2018, and EU member states have until Jan. 10, 2020 to implement it in their respective national laws.

CEX.IO is also a registered member of the the Financial Crimes Enforcement Network (FinCen) of the United States Department of the Treasury, and still has to perform operations in accordance with U.S. law. CEX Regulatory Affairs Counsel Serhii Mokhniev reportedly commented on the company’s decision:

“We have always understood the importance of dealing with virtual currency within a legal framework, so mandatory verification for customers who transact in fiat currency was introduced long before the Fifth Anti-Money Laundering Directive was adopted in the EU.”

In December 2017, the U.K. and EU jointly announced that they are planning a crackdown on crypto-enabled money laundering and tax evasion. The increased regulations, in line with directives in the EU, are intended to limit the amount of anonymity possible for cryptocurrency traders. In October, U.K. Economic Secretary to the Treasury Stephen Barclay said: