SMS compliance, in plain language.

Text messaging works extraordinarily well, which is exactly why the rules around it have teeth.

SMS is the most effective direct channel most businesses have. Open rates dwarf email. Response times are measured in minutes. It is also the channel with the most regulation, the most carrier enforcement, and the most expensive mistakes.

This is a plain-language orientation, not legal advice. For your specific situation, talk to an actual attorney — that is not a disclaimer reflex, it is the correct move.

Consent is the whole game

You need permission before you text someone for marketing purposes, and the permission has to be real: clear, affirmative, and documented. A phone number given for one purpose is not blanket permission for another. Someone who called about a repair did not opt into your promotions.

Keep records. When they consented, how, and to what. If it is ever questioned, "we're pretty sure they said yes" is not a position.

Opt-out has to work

STOP must work, immediately and reliably, and it must be honored across your systems rather than in one tool while another keeps sending. Tell people how to leave, and make leaving easy. The businesses that get burned are the ones that made unsubscribing slightly difficult.

Identify yourself

Every message should make clear who is texting. Anonymous marketing texts are how you get reported, and reports are how numbers get shut down.

Registration is not optional anymore

Carriers require business messaging to be registered — the brand and the campaign both. Unregistered traffic gets filtered, throttled, or blocked outright, often silently. If your texts have mysteriously stopped landing, this is usually why. Registration is paperwork, it takes time, and doing it before you need it is far less painful.

Practical habits that keep you clean

• Separate transactional from marketing. An appointment reminder and a promotion are different things with different rules.
• Respect quiet hours. A 6am promo is legally risky and universally hated.
• Do not buy lists. Ever. There is no version of this that ends well.
• Watch your frequency. The channel's power comes from scarcity. Burn it and people leave.
• Audit annually. Rules move. Your list ages. Old consent is weak consent.

Why bother with all this

Because done correctly, SMS is the closest thing to a direct line to your customer that exists, and the rules exist precisely because it is that powerful. Treat the channel with respect and it will out-earn everything else you run.