Why This Rejection Happens
Your sample messages contain a public/shared URL shortener (e.g., bit.ly, tinyurl.com, goo.gl). These domains are strictly prohibited on 10DLC because they are commonly used by bad actors to hide phishing links.
Root Cause Analysis
Prohibited Domains (Examples)
- ✗ bit.ly
- ✗ tinyurl.com
- ✗ goo.gl
- ✗ ow.ly
- ✗ is.gd
- ✗ rebrand.ly (free tier)
The Fix
Option A: Use Full Links
"Check your status at https://mytcrplus.com/status"
Option B: Branded Shortener
"Check your status at https://link.mytcrplus.com/status" (Must match your brand domain)
Related Rejection Codes
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What reviewers check for code 6013
Code 6013 is reported as "Public URL Shortener Detected". Public URL shorteners such as bit.ly, tinyurl and goo.gl hide link destinations and are widely used in phishing, so carriers filter or block messages that contain them. Reviewers reject samples with public shorteners. Branded short domains owned by the sender are acceptable.
Where code 6013 comes from
Code 6013 is a campaign review reason code used to report a specific deficiency found during manual campaign vetting. CSPs surface it in the rejection notice alongside any other codes found in the same review, so check for companion codes before resubmitting. It has a documented fix that usually needs one targeted correction and a resubmission.
Link in a sample message
Rejected:
Book now: bit.ly/3xYz12
Approved:
Book now: https://northlinehvac.com/book
Fix and verify before resubmitting
- Replace public shortener links in samples and templates with full URLs on your domain.
- If you need short links, use a branded short domain you own (for example go.northlinehvac.com).
- Declare embedded links in the campaign attributes.
- Make sure links resolve over HTTPS to pages related to the message.
- Check marketing tools for automatic link shortening and disable it.
- Resubmit with a note that references code 6013 (Public URL Shortener Detected) and lists each change made.
Sample resubmission note
Many CSPs let you add a note for the reviewer when you resubmit. A short, specific note shows what changed and speeds up the second review. Example for Northline Heating & Air:
Northline Heating & Air corrected the deficiency reported as code 6013 (Public URL Shortener Detected). Changes made: replace public shortener links in samples and templates with full URLs on your domain; if you need short links, use a branded short domain you own (for example go.northlinehvac.com); declare embedded links in the campaign attributes. All URLs, keywords and auto-replies were re-tested from an external network before this resubmission, and the campaign text now matches the live opt-in exactly.
Common mistakes that keep code 6013 coming back
- Leaving automatic shortening on in an email-to-SMS tool.
- Using a free branded shortener on a shared domain.
- Fixing samples but not production templates.
Related rejection codes
- Code 30892: Public URL Shortener Prohibited
- Code 2131: Verbal Script Missing STOP Instructions
- Code 2128: Opt-in Form Missing HELP Instructions
- Code 2127: Verbal Script Missing STOP Instructions
- Code 2126: Opt-in Form Missing STOP Instructions
- Code 2124: Verbal Script Missing Frequency Disclosure
Frequently asked questions about code 6013
Are branded short links allowed?
Yes, when the short domain belongs to you and is used only for your links.
Will messages with bit.ly be blocked after approval?
Often yes. Carriers filter public shorteners in live traffic as well, so remove them everywhere.