SMS feels informal, so teams treat it casually. That is exactly how a brand ends up with carrier filters, blocked short codes, and angry customers. A text message lands on a personal device and is subject to stricter rules than email.
A short compliance check before every broadcast protects the channel you depend on.
The check is not legal advice, and it does not replace a lawyer for your specific markets. It is the operational discipline that keeps a well meaning campaign from becoming a complaint.
Confirm the consent and the opt in path
Every recipient must have given consent for the type of message you are sending. Promotional broadcasts need express opt in, and a phone number collected during checkout does not always qualify. Confirm where each number came from and whether that source permits marketing texts.
Keep the opt in evidence, including the date, the source, and the exact language the person agreed to. If a complaint is filed, that evidence is your defense.
Never import a purchased phone list into an SMS tool. The channel is not built for cold contact, and the reputational damage is fast and hard to reverse.
Verify the sender registration and the brand
Most platforms require a registered sender such as a toll free number, a short code, or a branded sender ID. Registration links your business to the number and is what carriers check when a complaint arrives. Confirm the registration is approved and active, not just submitted.
Check that the brand name in the message matches the registered sender. A mismatch confuses recipients and looks like a spoof.
If you are sending across countries, confirm the sender type is supported in each one. Some countries do not allow the same number or alphanumeric sender you use at home.
The Twilio help center documents sender registration and opt out handling. Use the current documented rules for the sender type in your account.
Handle STOP and HELP correctly
Every marketing message needs a clear opt out path. The standard keywords such as STOP, UNSUBSCRIBE, and CANCEL must be honored automatically, and the opt out must apply to the brand, not just the campaign. A person who texts STOP should not receive another marketing message from you.
The HELP keyword should return a reply that identifies your brand and explains how to get support. This is a baseline expectation that carriers look for.
Test both keywords on a real handset before a broadcast, not just in the platform preview. Confirm the confirmation message reads clearly and that the opt out is recorded against the right contact.
Respect quiet hours and time zones
Sending restrictions usually require messages to arrive during reasonable local hours. A send scheduled for 10 in the morning in your time zone can land at 3 in the morning for a recipient on the other side of the country. Store each contact's time zone or region so you can respect local windows.
Build quiet hours into the schedule rather than trusting the sender to remember. Most platforms support sending windows, so configure them once and let the tool enforce them.
If a contact's time zone is unknown, default to the most restrictive window that covers your audience instead of guessing.
Segment by region and by platform
Different regions have different rules, so segment your list by country or state before a broadcast. Apply the right consent standard, sender type, and quiet hours to each segment.
Separate iOS and Android contacts when the offer involves a link or a rich message, because formatting and link behavior can differ. This also helps you read performance by platform.
Remove anyone who has opted out, hard bounced, or been inactive for a long period. A smaller, cleaner list performs better and generates fewer complaints.
Preview the message and the links
Count the characters and segments in the final message. A careful draft that crosses one character into a new segment doubles the cost and can split a link. Check how the message renders on a real phone.
Test every link, including the shortened version, and confirm it lands on the right page with the right tracking parameters. A broken link in an SMS is worse than in email because the reader has no easy way to recover.
Include the brand name and the opt out instruction in the body. Recipients should not have to guess who is texting them.
Log the send and the opt outs
Record the date, the audience segment, the sender, and the message version for each broadcast. When a complaint arrives, you can show exactly what was sent and to whom.
Monitor opt outs after each send. A rising opt out rate is an early warning that the frequency or the content is off, and it belongs in the campaign review rather than in a forgotten report.
Keep suppression lists in one place so a contact who opted out of SMS is never re-added by a later import.
Keep the checklist short and mandatory
A workable checklist has six items: consent confirmed, sender registered, STOP and HELP tested, quiet hours set, segment clean, and links verified. Run it every time, including for small sends, because the mistakes that reach thousands of people usually start small.
Most of this work is operational and repeatable, which makes it a good fit for a trained VA once an owner sets the standards. To have these checks run for you, review our campaign admin service, or request a consultation with your current SMS setup.
