<table><tr><th>From:</th><th>Madars Virza</th></tr><tr><td>Sent:</td><td>Wednesday, March 28, 2018 2:37 AM</td></tr><tr><td>To:</td><td>jeffrey E.</td></tr><tr><td>Subject:</td><td>What is Bitcoin?</td></tr></table>

OFAC sanctions view:

https://www.treasury.gov/resource-center/faqs/Sanctions/Pages/faq_=ompliance.aspx#vc_faqs
<https://=www.treasury.gov/resource-center/faqs/Sanctions/Pages/faq_compliance.aspx#=<c_faqs>

It is interesting that=their treatment of addresses is one-sided:

Addres= == "identifier that represents=a potential destination for a digital currency transfer"; can be adde= to their blacklist. But what about *sources?

For almost all digital currencies it is true then when receiving a paym=nt you know source address in addition to the destination one. But not all=-- there are currencies where the recipient does not=learn the source address (and thus can't cross-check against any black=ists).