The answer
Losses from theft or loss of control can require detailed analysis and evidence; they are not automatically treated like a sale at zero value.
What to do next
Save transaction records, police reports where applicable and evidence of what occurred, then obtain current ATO guidance or professional advice for the specific facts.
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Frequently asked questions
Is a failed investment token automatically a deductible loss?
No. The way the asset was disposed of or ceased to exist determines the possible tax treatment.