A Bitcoin wallet that shows a green check mark has answered a narrow question. It has confirmed that a destination string is well formed, not that it belongs to the person or business you intended to pay. Those are two separate questions, and treating them as one is where most mistakes about valid addresses begin.
Bitcoin’s address standards describe encoding rules, not a directory of named recipients. BIP 350 assigns Bech32 to witness version 0 and Bech32m to witness versions 1 through 16, and it requires a decoder to match the encoding to the witness version while also checking the decoded witness program’s length and version. Those checks catch malformed destinations. They do nothing to stop an attacker who substitutes a different address that is perfectly valid on its own terms. A familiar-looking prefix is not a substitute for running the whole string through the applicable checks, and a passing checksum is not an identity check.
The practical result is that several safeguards with similar names have different jobs. Choosing the right network and asset confirms the payment is being prepared for the intended Bitcoin environment. Validating the complete address confirms it meets the encoding and destination rules. Independently confirming the destination against a trusted instruction confirms the address matches what the recipient actually asked for. Reviewing the signed payment confirms the transfer matches the preview. None of these steps substitutes for the one before it, and a green check on the first two should not make the third disappear.
The Bitcoin Developer Guide’s payment-processing documentation warns that incoming payment instructions must be protected against address substitution, and it recommends secure transport such as HTTPS. That warning points at the real boundary: the address has to reach the sender without being silently changed. HTTPS protects the connection to the site you opened; it is not a reason to trust every site that shows a lock icon. When a payment request changes unexpectedly, confirm the change through a channel you already trust rather than a contact detail supplied inside the suspicious message.
Two other habits create false confidence. Looking up an address’s transaction history shows activity, but it does not prove that the person asking for payment controls the destination or that a screenshot belongs to their account; a watch-only setup can display a balance without holding the keys needed to spend it. And a successful small test transfer only confirms that the expected recipient received and recognized that one payment. It does not authenticate a later instruction, so a new destination still needs its own full review.
The address standards are genuinely useful precisely because they check a defined technical condition. The mistake is asking a format validator to answer a different question about identity, trust, or account ownership. A defensible workflow keeps both controls in place: let supported wallet software validate the complete destination, then establish, through a trusted instruction and a deliberate review, why that destination is the right one.
Source: BTCUSA.