Provision record
Substack · Substack Terms of Use · View original document ↗

SMS Used Only for Phone Number Verification

Low severity Explicit document language Common · 279 of 352 platforms
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This analysis describes what Substack's agreement states, permits, or reserves. It does not constitute a legal determination about enforceability. Regulatory applicability and practical outcomes may vary by jurisdiction, enforcement context, and individual circumstances. Read our methodology

Clause Stability Stable

0
Changes
3
Months Monitored
Jul 10, 2026
First Seen
Jul 10, 2026
Last Seen
This clause type exists across 3333 other provisions on other platforms.

How other platforms handle this

Roblox Medium

Additionally, with your explicit and informed consent, we may use your phone number to recommend you as a friend to others using Roblox. You will be recommended with your contact name as stored on your ...

Lyft Medium

Find and prevent fraud; and Block and remove unsafe or fraudulent users from the Lyft Platform.

Square Medium

we may use this information to make it easier for you to find the people you want to send payments to, for account and identity verification and fraud prevention purposes, to reduce the risk you will send payments to the wrong person, or to provide other personalized services.

See all platforms with this clause type →
▸ View Original Clause Language DOCUMENT RECORD
"
If you provide us your phone number, we may use an SMS message to verify your control of the phone number.

Excerpt from Substack's Terms of Use

Applicable regulations

CCPA/CPRA
California, USA
CAN-SPAM
United States Federal
ePrivacy Directive
European Union
FTC Act Section 5
United States Federal
GDPR
European Union
UK GDPR
United Kingdom

Provision details

Document information
Document
Substack Terms of Use
Entity
Substack
Document last updated
May 5, 2026
Tracking information
First tracked
May 21, 2026
Last verified
May 21, 2026
Record ID
CA-P-029384
Document ID
CA-D-00177
Evidence Provenance
Source URL
Wayback Machine
Content hash (SHA-256)
d2d135642274ee5eac38277ac41a146ef9980ab32b5eaa9fe939658be5f65972
Analysis generated
May 21, 2026 01:31 UTC
Methodology
Evidence
✓ Snapshot stored   ✓ Hash verified
Citation Record
Entity: Substack
Document: Substack Terms of Use
Record ID: CA-P-029384
Captured: 2026-05-21 01:31:22 UTC
SHA-256: d2d135642274ee5e…
URL: https://conductatlas.com/platform/substack/substack-terms-of-use/provision/CA-P-029384/sms-used-only-for-phone-number-verification/
Accessed: Aug. 3, 2026
Permanent archival reference. Stable identifier suitable for legal filings, compliance documentation, and research citation.
Classification
Severity
Low
Categories

Other risks in this policy

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Frequently Asked Questions

What does Substack's SMS Used Only for Phone Number Verification clause do?

The clause states: “If you provide us your phone number, we may use an SMS message to verify your control of the phone number.”

How many platforms have this type of clause?

ConductAtlas has identified this type of provision across 279 platforms. See the full comparison.

Is ConductAtlas affiliated with Substack?

No. ConductAtlas is an independent monitoring service. We are not affiliated with, endorsed by, or sponsored by Substack.