Blood dries very dark red or brown on paper. It might look different in person but based on the pic I don’t think it’s blood, just red ink. That said I wouldn’t blame anyone handling it for putting gloves on because whoever sent this is clearly unhinged.
Is that a finger print?
Possibly in blood. Yuck.
Yes and probably in blood I would imagine…
Blood dries very dark red or brown on paper. It might look different in person but based on the pic I don’t think it’s blood, just red ink. That said I wouldn’t blame anyone handling it for putting gloves on because whoever sent this is clearly unhinged.
Seems like good news if you are in the Postal Service. If it has blood on it you get to seal it in a bag and not have to deal with it 
Yes , a sovcit trope is that a red ink and thumbprint or fingerprint magically do something.
The Dickens.
I wonder if it’s like their postage or seal or something.