Before you block anything, be sure you read the Ukraine Sanctions and what is covered under them. Just because a transaction occurs through a bank listed there doesn't mean that the transaction isn't allowed. The sanctions are pretty detailed as to what is allowed and what isn't.
Last edited by Justin Case; 12/28/18 06:28 PM.
Edited to add: "EO 13662 applies to new debt or equity, all transactions in, provision of financing for, and other dealings in new debt of longer than 14 days maturity or equity of persons determined to be subject to this Directive.
All other activities with these persons or involving their property or interests in property are permitted."
If you provide additional details on the transaction in question, it would help determine if it is, in fact, one that needs to be blocked.