What is targeted financial sanction (TFS)? What are the TFS regime that bank has to comply?

While examining shipping document by a negotiating bank it identified that the Bill of lading was issued by a UN sanctional shipping line. What coursed of action bank should take in this situation?

What are the similarities and differences between UN sanction regime and unilateral sanction regime like Office of Foreign Asset Control (OFAC) in respect of Bangladeshi Bank?

Describe the implication of violation of UN sanction and OFAC sanction.