Request eSignatures via SMS
Send a contract to your signer’s phone as a text message with BoldSign. They tap the secure link and sign in the phone browser.
- SMS in 26 countries
- No app or account for the signer
Trusted by 100,000+ organizations worldwide
The contract is ready, but the signer is away from a desk
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Email gets buried
Signature requests land among newsletters and receipts. A signer on site may not open email for days.
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The email address is not reliable
Some signers share an inbox or give an old address. A phone number is often the surer contact.
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Apps and logins slow signers down
Asking a signer to install an app or create an account adds a step many skip.
How do you send a signature request by SMS?
Choose SMS for the signer when you prepare the document. BoldSign texts the link, and the signer signs on the phone.
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Choose SMS for the signer
On the Prepare Document page, open Delivery Options and pick SMS. Enter the number with its country code.
Prepare DocumentRecipient name*Emily CarterDelivery OptionsSMSPhone number*+1 XXX XXX XXXXSample BoldSign Prepare Document screen: Emily Carter as the signer, with SMS chosen under Delivery Options and her phone number -
The signer gets a text
BoldSign sends a text message with a secure link to the document.
Sample text message from BoldSign to Emily Carter: Daniel Ortiz has requested you to review and sign Service Agreement, with the signing link -
The signer opens the link and signs
The document opens in the phone browser. The signer fills each field and signs.
Sample signing page on a phone, opened from the text message: Emily Carter’s Service Agreement with her name and company filled in and a signature field left for her
Should you send by SMS, or by email and SMS?
Choose SMS when the phone is the surest way to reach the signer. Choose email and SMS when you are not sure which one they check.
- SMS: the signing link goes to the phone only.
- Email and SMS: one request reaches both the inbox and the phone. Read the email and SMS guide.
- Each signer on a document can get a different channel, such as email or SMS.
- From your own software, set the signer’s delivery mode to SMS. See the API guide.
Which BoldSign features work with SMS signature requests?
These features go with an SMS request, from sending it to proving who signed.
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Email and SMS at once
One request reaches the signer’s inbox and phone together. Read the guide
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SMS authentication
Ask a signer for a one-time code sent by text before the document opens. See signer authentication
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Templates
Save the SMS delivery setting in a template and reuse it for every send. See the template guide
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The BoldSign API
Set each signer’s delivery mode to SMS from your own software. See the API guide
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Delivery failure alerts
Webhooks tell your system when a text message cannot be delivered. See delivery alerts
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Power Automate
Send SMS signature requests from a Power Automate flow, with no code. See Power Automate
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Manual reminders
Remind an SMS signer by hand at any time. Automatic reminders go by email only. See reminders
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An audit trail for every request
Each view and signature is logged, whichever channel sent the link. See the audit trail
Where teams send signature requests by SMS
- Real estate
Leases and purchase offers
Reach buyers and tenants on the phone they check most.
See real estate - Healthcare
Patient consent forms
Text the consent form link before the appointment.
See healthcare - HR
Offer letters and onboarding forms
Get new hires signed before their first day.
See HR teams - Insurance
Policies and claim forms
Collect signatures from policyholders away from a desk.
See insurance - Legal
Engagement letters and approvals
Get client sign-off without waiting on email.
See legal teams - Banking
Account openings and loan forms
Send forms to customers who bank from their phone.
See banking
Why choose BoldSign for SMS signature requests
BoldSign sends text requests from the same account as your emailed ones, with a spending cap you control.
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One document list for every channel
Documents sent by SMS sit in the same list as emailed ones, with the same statuses.
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A budget cap for text messages
Set an SMS budget limit once in your subscription preferences. It applies to your whole organization.
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A check before signing
Add an access code or ID verification before the signer opens the document.
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Every step on record
The audit trail logs a text request from sending to the final signature.
Is it safe to send a signature request by text message?
Yes. Each BoldSign text holds an encrypted link to that signer’s copy only. Require an access code if you want a check first. Every view and signature lands in the audit trail.
Compliance
BoldSign meets global security and compliance standards to protect your documents and data. Manage the settings below to align with your organization’s requirements.
Data Residency
Active (US - Global)Your documents and signer data are securely stored in your selected region to meet data sovereignty and local regulatory requirements.
HIPAA Compliance
EnabledEnable HIPAA mode to protect PHI using administrative, technical, and physical safeguards aligned with HIPAA regulations.
PCI DSS
CompliantPayments are securely processed through Stripe, a PCI DSS Level 1-certified provider, ensuring the safe handling and encryption of all payment data.
CCPA & CPRA
CompliantEnsures compliance with California privacy laws, giving residents transparency and control over their personal data, including rights to access, delete, and opt out.
SOC 2 Type II
CompliantBoldSign has successfully completed a SOC 2 Type II audit, validating our controls for security, availability, confidentiality, and data integrity.
UETA & ESIGN
CompliantBoldSign ensures that all e-signatures are legally binding and compliant with the U.S. ESIGN Act and the Uniform Electronic Transactions Act (UETA).
eIDAS (SES)
CompliantBoldSign complies with the EU eIDAS Regulation (910/2014) and supports Simple Electronic Signatures (SES) by default.
eIDAS (QES)
EnabledEnable Qualified Electronic Signatures (QES) for contracts requiring the highest legal assurance under eIDAS.
Limits and costs to know before you request eSignatures via SMS with BoldSign
BoldSign uses SMS to send signing links and notifications. Prices are in USD.
- $0.20 per SMS Charged for each message sent (rates).
- $15 Business plan, per user a month Billed yearly. SMS delivery is not on the Essential or Growth plans.
Before your first SMS request
- 26 supported countries Numbers outside these countries cannot get SMS requests (country list).
- Automatic reminders are not sent by SMS.Send reminders by hand instead.
- Email OTP authentication cannot be used with SMS delivery.
- Signing groups cannot receive requests by SMS.
- CC recipients do not get SMS notifications.
- The text of the SMS message cannot be customized.
More on sending signature requests to a phone
- Page
Multi-channel delivery
Email, SMS, and WhatsApp compared by plan, cost, and limits.
See the page - Page
Signature requests by WhatsApp
Send the signing link to the signer’s WhatsApp chat.
See the page - Guide
Request eSignatures by text message
Each step of an SMS request, with screenshots.
Read the guide
Questions about SMS signature requests
How much does an SMS signature request cost?
Each text message is charged on top of the Business plan or higher. The rate is in the limits section.
Which countries can receive SMS signature requests?
26 countries, including the United States, Canada, the United Kingdom, Germany, India, Australia, and Brazil. See the full country list.
Does the signer need an app or a BoldSign account?
No. The link opens the BoldSign signing page in the phone browser. See the signing steps.
Can I send one request by both email and SMS?
Yes. Choose Email and SMS under Delivery Options, then enter both the address and the number. Read the email and SMS guide.
Can I send SMS signature requests through the API?
Yes. The send document API sets each signer’s delivery mode, such as SMS. See the API guide for SMS requests.
Can I limit what my team spends on SMS?
Yes. Set an SMS budget limit in your subscription preferences, and it applies to everyone in your organization. See the pay-as-you-go guide.
Are documents signed from a text message legally binding?
Yes. BoldSign complies with the ESIGN Act, UETA, and eIDAS, whichever channel delivers the link. See eSignature legality by country.
Reach signers on the phone they already carry
Start a BoldSign trial and send your next request by text message.
- 30-day free trial
- No credit card required
Last updated: October 29, 2026