The State Department has designated Niamat Hama Rahim Hama Sharif, also known as Saed Tawealy and Sa'ad Tawela, as a Specially Designated Global Terrorist. This designation was made under Executive Order 13224, which targets leaders of terrorist groups, in this case, the al-Qa'ida Kurdish Battalions. The order blocks any property or interests Sharif might have in the U.S. Additionally, it's noted that no advance notice will be provided to Sharif about this action, as it could make the order ineffective.
Simple Explanation
The State Department says that Niamat, who is linked to a group called the al-Qa'ida Kurdish Battalions, is now on a special list of bad people called terrorists, and this means any money or stuff he has in the U.S. is frozen so he can't use it. They didn't warn him first because he could quickly move his money away if he knew.