Surely you won't know if the blood is capable of spreading a pathogen until it's tested. That's why untested blood should be 6.2 until proven otherwise.
The shipper will get hammered for lying. Those guys in China responsible for writing off the Malaysian A330 are in for millions in damages. Undeclared barrels of improperly packed DG split open in flight. Can't remember all the details.
Carrier variations are more restrictve than IATA regs. I believe SQ ban everything except class 9 into the States. CX had a ban on Gallium on all their aircraft after an acccident. (Nasty stuff Gallium; stable when kept cold, highly corrosive if it gets warm).
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rgds Rat