Quick answer
Squarespace cannot send A2P SMS, so your texting platform (Twilio, SimpleTexting, a CRM) holds the 10DLC registration. Your Squarespace site supplies the public opt-in page that TCR reviews. Build it with a form block or code block containing an unchecked SMS checkbox and the full carrier disclosure set.
Squarespace attracts service businesses, studios, and boutiques, exactly the businesses now being told by their SMS provider that they need '10DLC registration' and an 'opt-in URL'.
Both requirements route back to your website. The registration itself happens in your SMS platform's console, but the evidence it points to is a Squarespace page, and the consent quality it implies is decided by how that page is built.
How SMS Works With Squarespace
Squarespace form blocks capture leads into email campaigns or connected services. SMS requires connecting those captures to an external sender via native integrations, Zapier, or manual export.
For 10DLC, the sending platform registers your brand and campaign. During campaign review, TCR loads the opt-in URL you provide, typically a Squarespace page, and checks the checkbox and disclosure content visually.
How to Set Up 10DLC for Squarespace
- 1
Add a dedicated SMS sign-up section or page
Use a form block with a checkbox field on any public page. Business plans and above also allow code blocks, which let you embed a purpose-built consent form instead.
- 2
Write the disclosure under the checkbox
A text block immediately below the form should carry brand name, expected frequency, 'Msg & data rates may apply', STOP/HELP instructions, and a privacy policy link. Keep checkbox label SMS-specific.
- 3
Register with your SMS platform and submit the URL
Complete brand verification with your EIN and legal name, declare the campaign use case honestly, and paste the Squarespace page URL as opt-in evidence.
- 4
Test the page as a reviewer would
Open it logged out, on mobile, with an ad blocker. If the checkbox renders pre-checked, the disclosure is below the fold of the form, or the page requires interaction to see consent text, fix it before submitting.
Where Squarespace Setups Fail TCPA Review
Carrier approval is step one. These are the consent gaps that turn into demand letters.
Squarespace form submissions record the entry but not the disclosure text in force at submission time
Checkbox state may not be included in exports or Zapier payloads depending on field configuration
Template newsletters blocks use one checkbox for all marketing, bundling email and SMS consent
No tamper-proof storage: submissions are deletable by any site admin
How OptInFix Closes the Gaps on Squarespace
Code-block embed with everything included
Paste the OptInFix embed into a Squarespace code block for a form with auto-injected, always-current disclosure language and SMS-only consent scope.
Reviewer-proof hosted page
Use your hosted OptInFix consent page as the opt-in URL if you prefer not to modify the site, or while your Squarespace page is being redesigned.
Court-grade records per subscriber
Session replay, IP, geolocation, timestamp, and the exact form version are captured and hash-locked for every opt-in collected through the embed.
10DLC for Squarespace: Frequently Asked Questions
Does Squarespace support SMS marketing natively?
No. Squarespace covers email campaigns. SMS requires an external platform that holds a 10DLC registration for your brand and sends on your behalf.
Can a Squarespace form be my 10DLC opt-in URL?
Yes. The page must be public, the checkbox unchecked and SMS-specific, and the full disclosure visible. TCR reviewers evaluate content, not the website builder.
Which Squarespace plan do I need?
Any plan can host a compliant native form. Code block embeds for dedicated consent forms require Business plan or higher.
What evidence should I keep beyond the form submission?
The disclosure language shown at the time, the checkbox state, a timestamp, and ideally session-level proof. Squarespace alone retains only the submission fields, which is why an evidence layer matters.