# Verify your signers' identity with a code

Ask your signers for a code sent by email or SMS before they open your document, and see how the one-time signing code of the advanced signature works.

Updated: 2026-10-21  
Source: https://drime.cloud/support/sign/verify-signers

You can make your signers prove they are who you sent the document to: they type a 6-digit code before they see the document. The code goes to their email address or to their phone by SMS.

## Two ways to ask for a code

| Check | Where you set it | Applies to |
| --- | --- | --- |
| Code by SMS | **Signers** step, on each signer | That signer, in that request |
| Code by email | Sign **Preferences** | Every signer of every request you send |

You can use both. The signer then confirms the email code first, then the SMS code.

## Ask one signer for an SMS code

1. In the **Signers** step, on the signer's card, turn on **SMS verification (2FA)**.

2. Choose the country, then enter the signer's mobile number.

3. Continue the request as usual, then send it.

![A signer card in the Signers step with SMS verification (2FA) turned on, the country picker and a phone number](https://drime.cloud/media/01M5F1PW41RN0NZPHVMTESG7YF/3833b01f9bbe-web-sign-signer-sms-switch.png)

When the signer opens their link, they see **Phone verification required**. They click **Send the code**, type the code they receive by SMS, then click **Verify**.

## Ask every signer for an email code

1. Go to **Tools** \> **Sign**, then click **Preferences**.

2. On the **General** tab, open **Form preferences**.

3. Turn on **Require email verification (2FA)**, then click **Save**.

![Sign Preferences, General tab, Form preferences open with Require email verification (2FA) turned on](https://drime.cloud/media/01M5F1PCVC5HR84ES9AXH6MBMX/2c0ec511268c-web-sign-preferences-email-2fa.png)

From then on, signers see **Email verification required** when they open their link. They click **Send the code**, type the code from the email, then click **Verify**. The document opens afterwards.

![The signing page asking for the code sent by email, with the Verify button](https://drime.cloud/media/01M5F06S8HNP5HKKSHSW19DSTZ/55fa6dbb1ace-web-sign-signer-email-code.png)

## The signing code of the advanced signature

If you chose **Advanced signature** in the **Signature** step, every signer confirms their signature with a one-time code at the moment they sign:

- the code goes by email. To send it by SMS instead, turn on **Send the signing code by SMS** on the signer's card and enter their mobile number;
- the signer clicks **Send my signing code**, then types the 6-digit code. The screen says it expires in 5 minutes;
- after 5 wrong codes, the signer must ask for a new one.

The advanced signature adds no check before the document opens, even when **Require email verification (2FA)** is on: the signer is identified once, by the signing code, when they sign.

## If it doesn't work

| What the signer sees | What to do |
| --- | --- |
| No code arrives | Click **Didn't get the code? Try again**. For an email code, check the spam folder. For an SMS, check the number with the sender. |
| **Invalid signing code.** | The code is wrong or was mistyped. Type it again, or send a new one. |
| **Too many attempts. Request a new signing code.** | 5 wrong codes were typed. Click **Send my signing code** again and use the new code. |
| The code has expired | Ask for a new code, then type it straight away. |

## Next steps

- [Share a signing link yourself](https://drime.cloud/support/sign/share-a-signing-link)
- [Sign a document you received](https://drime.cloud/support/sign/sign-a-document-you-received)
- [Send a document for signature](https://drime.cloud/support/sign/request-signatures)