In the context of these software downloads, a "flash" transaction refers to a Bitcoin transfer that appears in a recipient's wallet but never actually confirms on the blockchain. These transactions are essentially "fictitious coins" that mimic real ones for a short period before vanishing.
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: Under the GENIUS Act of 2025 , using software to intentionally mislead others about cryptocurrency balances is considered wire fraud in many jurisdictions, including the US, and can lead to harsh criminal penalties. How to Verify Real vs. Fake Transactions