# Opt-In, STOP and Sender Reputation — BM CRM

> How WhatsApp opt-in works, what STOP must trigger, how quality ratings behave, and the habits that keep a business number healthy for years.

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## The rules that keep your number alive and delivering

On WhatsApp, your sender reputation is a business asset — and it is earned. This guide explains opt-in, STOP, and quality ratings in plain language, and the habits that keep a number healthy for years.

## What opt-in really means

Opt-in means the person agreed to hear from your business on WhatsApp — by messaging you first, ticking a box on your form, or telling you in conversation. A purchased list is the opposite of opt-in.

Practical consequence: leads who message you or submit your ad form have opted into the conversation they started; broadening beyond that — newsletters, promotions — should be its own clear yes.

## STOP is sacred

When someone writes STOP (in any phrasing), everything to them must stop — instantly, across campaigns and automations, and only the customer can reverse it. This must be enforced by your system, not by someone remembering.

Honoring STOP well is not just compliance; it is what keeps the rest of your list warm and your block rate low. A clean list outperforms a big one.

## How quality ratings behave

WhatsApp watches how people react to your messages: blocks and reports lower your rating; replies and continued conversations support it. Ratings move gradually — and recover when behavior improves.

The levers are boring and effective: message people who expect you, be useful in the first line, send at humane hours, and prune contacts who never engage.

## Habits of long-lived numbers

Warm up sending volumes gradually rather than blasting a cold list on day one. Watch reply rates per campaign — falling replies predict trouble before ratings move.

And automate the guardrails: opt-out enforcement, quiet hours, failure-spike pausing. Numbers die from repeated small carelessness, almost never from one mistake.

## Frequently asked questions

### Does an ad click count as opt-in?

Starting a WhatsApp conversation from an ad opts the person into that conversation. Ongoing marketing beyond it deserves its own explicit yes — a box on the form, or a question in chat.

### Can a customer opt back in after STOP?

Yes — but only the customer can, by telling you so. Nothing on the business side should ever reverse an opt-out.

### What lowers a quality rating fastest?

Blocks and reports — which follow from messaging people who never asked, irrelevant content, and bad timing. The fix is always the list, not the copy.

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[BM CRM](https://www.bmcrm.ai) — https://www.bmcrm.ai/guides/whatsapp-opt-in-guide