Messaging Compliance: Prohibited Practices & How to Stay Safe

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When it comes to messaging campaigns, compliance is more than a best practice—it’s a legal requirement.

Governing bodies like the CTIA (Cellular Telecommunications Industry Association) and the TCPA (Telephone Consumer Protection Act) enforce strict rules to protect consumers from spam, misinformation, and other harmful messaging practices.

This guide will walk you through prohibited messaging practices and content and explain how CallHub ensures compliance, keeping your campaigns within legal and ethical boundaries.

Prohibited messaging practices

Understanding the messaging rules that regulate communication is essential. Let’s examine these rules and how they help maintain a healthy messaging environment.

Here’s what you need to know:

Sharing, selling, or renting consent

Consent to receive messages is specific to the entity that obtained it. The CTIA and TCPA prohibit the sharing, selling, or renting of this consent to other organizations or entities.

This means that if a customer has given consent to receive messages from one brand, that consent cannot be transferred or sold to another brand or third party. Violating this prohibition can result in significant fines and legal repercussions.

Phishing

Phishing involves sending messages that appear to originate from reputable companies to deceive recipients into disclosing sensitive information, such as passwords and credit card numbers.

Snowshoeing

Snowshoeing refers to the use of multiple source numbers to distribute messages in an attempt to circumvent spam filters. All operators ban this practice due to its impact on deliverability, and campaign or account suspension is possible.

Filter evasion and number cycling

Filter invasion involves replacing blocked phone numbers with new ones to evade filters. On the other hand, number cycling consists of discarding numbers with poor deliverability and substituting them with new ones, which results in a negative user experience and may imply issues with consent or message quality.

Grey route

When you send a message from your campaign, it passes through your network carrier and is then delivered to the recipient via the destination carrier.

However, there are cases where messages intended for a recipient within the same country are routed through international carriers before returning to the original country.

This process, known as grey routing, is typically used to reduce messaging costs and sometimes bypass certain telecom regulations.

While grey routing isn’t entirely illegal, it does violate specific telecom regulations designed to prevent the misuse of messaging systems. Messages sent through a grey route could result in a penalty of $10 per message.

Dynamic routing

Ensure that each phone number follows a singular delivery route. Dynamic routing to bypass spam blocking mechanisms is prohibited and can lead to the disabling of messaging campaigns.

URL redirects and forwarding

Message senders must ensure that any website links in their messages represent the sender’s identity and are not meant to deceive or harm recipients. The shortened link must be associated with the sender’s dedicated domain or IP address when using URL shorteners.

The web addresses within the messages and the websites they direct to should transparently disclose the website owner (either an individual or legally registered business entity) and provide contact details, such as a postal mailing address, to ensure complete transparency.

Avoid including URLs in messages that redirect through multiple layers, as this can obscure the final destination and result in immediate suspension of services.

Other common mistakes to avoid in SMS compliance

Opt-out requests must be processed immediately.
Businesses must obtain express written consent before sending automated messages.
It is required to inform recipients of any applicable message and data rates and to disclose the frequency of messages.
Accurate records of all consents and opt-outs are essential for compliance. Proper documentation is necessary for legal disputes and audits, and it ensures that businesses can demonstrate adherence to TCPA regulations.

Note: This information is sourced from the CTIA Messaging Guidelines and TCPA Compliance

Prohibited message types

These restrictions are in place to protect consumers from harmful, misleading, or offensive content.

The following are some of the primary prohibited message types:

Profanity and inappropriate language

Messages containing vulgar, obscene, or inappropriate language are strictly prohibited. Carriers can block messages containing profanity and penalize the sender.

SHAFT

Content related to sex, hate, alcohol, firearms, and tobacco (SHAFT) is prohibited.

This includes

Messages about adult entertainment and violence.
Messages that contain hate speech, discriminatory language, or promote violence against individuals or groups based on race, religion, gender, sexual orientation, or other protected characteristics.
The promotion of illegal activities and illegal substances, including drugs that are not approved by regulatory authorities.

Misinformation and deceptive content

Messages intentionally spreading false information, misleading recipients, or containing deceptive content are prohibited. This includes messages that make false claims about products, services, or offers.

Claims should be supported by scientific evidence when necessary, in compliance with the Federal Trade Commission’s (FTC) Truth in Advertising rules.

Scams and fraudulent content

Any message that attempts to defraud, deceive, or scam recipients is illegal. This includes phishing attempts, messages that ask for sensitive personal information under pretenses, or those that offer fraudulent services or products.

Unsolicited marketing messages

The TCPA requires that recipients explicitly opt in to receive marketing messages. Sending unsolicited marketing messages, especially without proper consent, violates the TCPA regulations.

Prohibited messaging practices on CallHub: Checks and measures

Messaging practices on CallHub are designed to ensure that our platform remains a compliant, safe, and respectful space for all users and recipients. We adhere to the guidelines set by governing bodies to prevent the misuse of our messaging services.

Monitoring & audits: We regularly monitor account activities and conduct audits to ensure compliance with consent regulations. Accounts violating these regulations will be suspended pending investigation.
Content filtering & blocking: Carriers use advanced algorithms to filter offensive, prohibited content and misinformation. Messages are flagged for manual review, and prohibited content is blocked. Repeat violations may result in account suspension with CallHub.
Rate limits & traffic monitoring: Carriers implement rate limits to prevent message overloads and monitor traffic spikes to detect spam activity. Accounts overloading the network may be temporarily suspended.
Fraud detection: Carriers can block deceptive or fraudulent messages. Accounts engaged in illegal activities face immediate suspension and potential legal consequences.
Phishing: Carriers use algorithms to detect and block phishing attempts, and suspicious accounts may be terminated and reported to law enforcement.

How CallHub helps you comply

Opt-out management: Our system automatically processes opt-out requests, updates statuses, and ensures no further communication is sent to opted-out contacts. All bulk messages include opt-out mechanisms. Contacts who opt out (e.g., STOP, CANCEL, UNSUBSCRIBE) are added to a Do Not Contact list and further messages are blocked.
Data security & compliance: We adhere to ISO 27001, GDPR, and SOC 2 standards. Advanced encryption and role-based access control protect sensitive SMS data, and all activity logs are maintained for audit purposes.
Operational hours: Default restrictions on CallHub prevent sending texts to US numbers before 8 AM and after 9 PM.
10DLC & shortcode support: We assist users in acquiring verified numbers and shortcodes for compliant messaging.
Support and education: Resources are provided to educate users on proper consent practices. Users must verify their opt-in status and maintain documentation of consent for audits.
The CallHub system is designed to automatically filter out certain types of contacts to ensure better message deliverability and compliance. The system helps you exclude:

Litigators: Contacts flagged as individuals who have a history of litigation related to messaging practices.
Landline numbers: Phone numbers identified as landlines that cannot receive SMS.
Invalid or malformed numbers: Numbers that do not follow proper formatting or are invalid.
VOIP numbers: Numbers associated with Voice over IP services may not support SMS reliably.

Staying compliant with messaging regulations is essential for building trust with your audience and running your campaigns smoothly. Knowing what practices to avoid and using CallHub’s compliance tools helps you send messages that respect your recipients.

Keep things transparent, and always get that consent!