Crypto exchange Kraken tightens up KYC rules for U.S. margin trading users.  

Cryptocurrency exchange Kraken announced that it would stop margin trading services for U.S. traders who fail to register with new KYC rules. The crypto exchange published a blog post stating that, from June 23, users who have only verified up until the starter tier will not be able to use margin trading.

https://coinnounce.com/crypto-exchange-kraken-tightens-up-kyc-rules-for-us-margin-trading-users/