# UnverifiedPulse (/docs/errors/chain/UnverifiedPulse)

Declared for drand pulses that fail validity checks, but current code raises `PulseVerificationError` for verification failures and silently skips unverified pulses. If seen on an older runtime, check the pulse signature against `BeaconConfig`.

Declared by the `Drand` pallet; it classifies to the semantic code [`invalid_argument`](/docs/errors/invalid-argument).

## Remediation [#remediation]

Check the argument values against the operation schema

The same explanation is available in the terminal: `btcli explain UnverifiedPulse`.