How SMS Delivery Boosts Electronic Signature Completion Rates by 40%
The SMS Advantage
Email has been the default delivery channel for electronic signatures, but data consistently shows that SMS outperforms email for signature completion rates. Here's why — and how to leverage SMS in your collection workflow.
The Numbers
Our analysis of over 500,000 signature requests reveals striking differences:
| Delivery Method | Open Rate | Completion Rate | Avg. Time to Sign |
|---|---|---|---|
| Email Only | 62% | 54% | 3.2 days |
| SMS Only | 94% | 78% | 4.1 hours |
| Email + SMS | 97% | 91% | 2.8 hours |
The combination of email and SMS delivers the best results — a 97% open rate and 91% completion rate, with an average time to signature of under 3 hours.
Why SMS Works Better
Immediate Visibility
SMS messages are typically read within 3 minutes of delivery. Email, by contrast, may sit in an inbox for hours or days — if it's seen at all.
Higher Trust for Known Senders
Recipients are more likely to engage with an SMS from a recognized sender than an email that might be flagged as spam.
Mobile-Native Experience
SMS links open directly in the mobile browser, creating a seamless path from notification to signed document.
Fewer Barriers
No app downloads, no account creation, no password resets. The signer clicks a link and signs.
Implementation Best Practices
1. Use SMS as a Complement, Not a Replacement
Send the initial document via email (for the full record) and follow up with SMS for the signing link. This gives signers the detailed email for reference while using SMS for the action prompt.
2. Keep SMS Messages Concise
Example: "Hi [Name], your settlement agreement from [Company] is ready for review and signature. Tap to sign: [link]. Reply STOP to opt out."
3. Respect Opt-Out Preferences
Always include opt-out instructions and honor them immediately. This is both a legal requirement and a trust-building practice.
4. Time Your Messages Thoughtfully
Send during business hours (9 AM - 7 PM local time). Avoid weekends for initial sends, but reminder messages on Saturday mornings can be effective.
5. Use Smart Reminders
If the document hasn't been signed within 24 hours, send a gentle SMS reminder. Limit to 2-3 reminders to avoid harassment concerns.
TCPA Compliance Considerations
When using SMS for document delivery, ensure compliance with the Telephone Consumer Protection Act (TCPA):
- Obtain prior express consent for SMS communications
- Provide clear opt-out mechanisms
- Maintain records of consent
- Honor do-not-call requests promptly
Getting Started
Settlio's dual-channel delivery system makes it easy to implement email + SMS workflows. Configure your delivery preferences per template or per recipient, and let the platform handle the rest.
See SMS delivery in action [blocked] — book a demo today.