The precautionary principle states that, if there is uncertainty regarding the effects of exposure to an agent, the burden of proof that exposure does not cause harm falls on those who utilize the agent.
The Australian Broadcasting Corp. has reported that Zygier was a Mossad intelligence service agent who hanged himself in a supposedly suicide-proof solitary confinement cell.
People were duped into sending a partial or full payment to a third-party agent via a wire transfer payment service and to fax their payment receipt to the seller as proof of payment.