When sending business SMS in the United States and Canada, compliance is critical. Mobile carriers enforce strict rules to protect consumers and prevent spam, fraud, and abuse. Certain industries and message types are not allowed on SMS and MMS—regardless of whether you’re using 10DLC, Toll-Free, or Short Code numbers.
At SMSBlast, we prioritize carrier compliance so your messages deliver reliably and your campaigns stay approved. Understanding these restrictions will help you avoid filtering, rejections, or account suspension.
What You Need to Know About SMS Restrictions
Forbidden use cases apply not only to message content, but also to the business type itself. Even perfectly worded messages can be blocked if the underlying industry is restricted.
Additionally, some technical practices—such as using generic URL shorteners—can trigger filtering even for otherwise compliant campaigns.
Commonly Forbidden SMS Categories in the US & Canada
High-Risk Financial Services
The following financial-related use cases are restricted due to high consumer complaint rates:
- Payday and short-term high-interest loans
- New loan solicitations
- Third-party loan marketing (auto, mortgage, personal, student loans)
- Cryptocurrency, stock trading, or investment platforms
Important notes:
- Promotional financial content is generally not allowed unless sent from an approved Short Code
- Investment and crypto businesses may only send transactional or 2FA messages
- Third-party loan marketing is not permitted
Third-Party Lead Generation & Affiliate Marketing
SMS messages may not be used for:
- Buying, selling, or sharing consumer data
- Affiliate lending or marketing
- Deceptive or indirect consent campaigns
Consent must always be collected directly from the end user. Any business that mentions selling or sharing opt-in data in its privacy policy is considered non-compliant.
Debt Collection & Credit Services
Restricted categories include:
- Third-party debt collection
- Debt consolidation or relief programs
- Credit repair services
First-party billing notifications (such as a hospital contacting its own patients) may be allowed only with proper consent. Promotional debt-related services are prohibited.
“Get Rich Quick” & Deceptive Opportunities
SMS messaging is not allowed for:
- Guaranteed income claims
- Pyramid or referral schemes
- Risk-free investment offers
- Mystery shopping or unrealistic work-from-home programs
These use cases are closely monitored by carriers and are routinely blocked.
Illegal or Regulated Substances
Businesses involving the following are not permitted to use SMS or MMS in the US or Canada:
- Cannabis, CBD, or Kratom
- Drug paraphernalia
- Vape products or e-cigarettes
- Fireworks
These restrictions apply regardless of state or provincial legality and include transactional or authentication messages.
Prescription Drugs
SMS promotion or sales of prescription medications are prohibited—even for licensed providers—if the drugs cannot be sold over the counter.
Gambling & Betting
Disallowed use cases include:
- Online casinos
- Sports betting or picks
- Gambling apps or platforms
- Sweepstakes and raffles
Limited exceptions may apply to community or local bingo messaging on approved Short Codes.
S.H.A.F.T. Content & Age-Restricted Products
This category includes:
- Sexually explicit content
- Hate or discriminatory messaging
- Alcohol
- Firearms
- Tobacco and vaping products
Alcohol messaging may be allowed in the US only with proper age verification (date of birth required). Firearms, vaping, and e-cigarettes are not permitted across any SMS number type. Canada enforces even stricter age-gated content rules.
Additional Compliance Rules to Keep in Mind
- Shared or public URL shorteners are not allowed
- Branded, company-owned domains must be used for links
- All campaigns must be accurately registered and approved
- Consent language must be clear and transparent
Even approved use cases can be blocked if these standards are not followed.
What If Your Use Case Is Restricted?
If your business falls into a forbidden category, SMS may not be the right channel. However, alternative communication methods—such as email, voice, or in-app notifications—may still be viable depending on your industry.
Our team at SMSBlast can help you evaluate compliant options and guide you toward the best messaging strategy for your business.
Final Thoughts
Carrier rules exist to protect consumers—and compliant businesses benefit the most. By understanding forbidden SMS categories and following best practices, you’ll ensure higher delivery rates, fewer disruptions, and long-term messaging success.
If you’re ever unsure about your use case, it’s always better to verify before launching a campaign.