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Markdown
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[Home](./index.md) > [@firebase/auth](./auth.md) > [ConfirmationResult](./auth.confirmationresult.md) > [verificationId](./auth.confirmationresult.verificationid.md)
## ConfirmationResult.verificationId property
The phone number authentication operation's verification ID.
<b>Signature:</b>
```typescript
readonly verificationId: string;
```
## Remarks
This can be used along with the verification code to initialize a [PhoneAuthCredential](./auth.phoneauthcredential.md)<!-- -->.