Turn on email OTP verification when you send. The signing link alone no longer opens the document: the signer must also enter a one-time code sent to the email address you entered, so only someone with access to that inbox can sign.
Email OTP verification
Verify every signer with a one-time email code
Turn on email OTP verification when you send a document. Before your signer can open it, they enter a 6-digit code sent to their email, so a forwarded or shared link is not enough to sign.
- Free on every account, no extra credit
- Signers need no account
- Works on every signing link
Verify your email to access this documentFreelance-Services-Agreement · for c***@example.com
How it works
One switch, then your signer does the rest
No app and no account for your signer. Just a code from their own inbox.
- Add new recipientsFirst party c***@example.comRequire email verification (OTP)Send1
You switch it on
In Add new recipients, switch on Require email verification (OTP) and click Send.
- InboxSignWith Your verification code2845172
Your signer gets a code
When they open the link, they ask for a code and it arrives in the inbox you entered.
- 284517Verified. Signing opens3
They enter it and sign
They type the 6-digit code and click Verify. The document opens and they sign as usual.
Why it matters
What OTP verification gives you
A shared link is not enough
The code goes to the signer’s inbox, so whoever holds the link also needs that inbox.
Works on every link
Sent by email, or copied with SHARE LINK to WhatsApp, Slack or text: the code check applies to all of them.
No extra cost
It is included on every account. Verification uses no extra credit.
No account for signers
Your signer only needs their email. No sign-up, no app, no password.
Resend in one click
If the code does not arrive, your signer clicks Resend code on the same screen.
One switch per send
Turn it on for the documents that matter and leave it off for quick ones.
When to use it
Switch it on for the documents that matter
Money on the line
Loans, payment plans and service contracts.
HR paperwork
Offer letters and policies the candidate must sign themselves.
Shared inboxes
When an assistant or a team inbox could open the email first.
Links sent in chat
When you share the link on WhatsApp or Slack instead of email.
Security and proof
Every signed document comes with proof
Check who is signing, keep a full record of what happened, and show anyone that the document has not changed since.
Verify your email to access this documentFreelance-Services-Agreement · code sent to c***@example.com
284517
Verify Email verified. Opening documentFAQ
team@signwith.co Frequently asked questions
Still unsure? Email us and a real person will help.
A check before signing. SignWith sends a 6-digit one-time code to the signer’s email, and they must enter it before the document opens.
In the Add New Recipients window, after you enter your signers’ emails. Switch on Require email verification (OTP) and click SEND.
No. It is included on every account and uses no extra credit. A credit is used only when the document is signed, as usual.
No. Your signer only needs access to the email address you entered. See Do signers need a SignWith account?
Yes. The code check runs whenever someone opens the signing link, however it reached them. See Can I send the signing link without email?
Ask them to check spam or promotions, then click Resend code on the verification screen. If the email address was wrong, send the document again to the right one.
Help center
Step-by-step guides
Send your next document with OTP switched on
3 documents free every month. OTP verification is included at no extra cost.
Try it freeYour signers do not need an account.