Signing and public verification
A transaction signature can demonstrate authorisation under a cryptographic scheme without publishing the secret key itself. The network can verify the relevant signature using public information. This is different from a service asking a user to send a password or recovery phrase through chat.
For example, a wallet signs an instruction to transfer an asset from an account. The resulting public transaction can include a signature and destination, but inspecting it does not require disclosure of the key. A support request for that key to locate a payment is therefore a different and dangerous action, not ordinary transaction tracing.
Key scope and custody
A seed phrase can derive multiple keys; a single exported key can have a narrower scope. A custodial service can hold keys on users' behalf, while a non-custodial wallet places signing responsibility with the user. Shared-signature or smart-account designs can require more than one approval and should be described precisely.
Local passwords do not replace key protection
A wallet password can protect the application or an encrypted local copy. Someone possessing usable key material may be able to act through another implementation. Changing an interface password is not automatically equivalent to replacing an exposed signing key.
Reading a security statement
Ask what controls signing, how keys are stored, what recovery material exists and which actions a signature approves. A signature can authorise more than a simple transfer in some systems, so inspect the request. Cryptographic validity does not establish that the destination or service is trustworthy. Public-key cryptography describes the broader mechanism; the private key is its secret component rather than the public information used to check an authorised operation.
Is signing a message always the same as sending money?
No. Systems can use signatures for login, ownership evidence, permissions or transactions. The consequences depend on the exact signed data and how the receiving system uses it. A request labelled verification is not automatically harmless. Inspect the context and legitimate documentation, and avoid signing an opaque request merely because no immediate transfer is displayed. A public address can support many ordinary checks without granting signing authority. Valid cryptography confirms a signature under its scheme, not the honesty of the person requesting it.