Follow-up tools work in different ways. Some send automatically within rules you set; others wait for you to approve each message. Either can be right. What matters is that you set the rules, can see what goes out, and can stop or correct it.
This checklist gives you things to try on any follow-up tool, including AgentsFast, which is made by DavidAgents, the publisher of this site. It doesn’t rank products, and it isn’t legal advice.
Before you test
- Use made-up customers, on numbers and inboxes you control. Keep real customers out of the test, and make sure anyone helping knows they’ll receive test messages.
- Test on a trial or a sample account. If the vendor only offers a walkthrough, ask to set off a follow-up yourself while they watch.
- Plan the clean-up. Afterwards, cancel any scheduled test messages and delete the test contacts.
Eight controls to check
For each check, note what happened and whether you could see and correct it yourself.
1 What starts a follow-up
A follow-up should have a reason you can point to: a call that ended without a booking, a quote you sent, a visit that moved.
- Try this
- With a made-up customer, set off each kind of follow-up the tool offers. Then find where it shows why each message was scheduled.
Good signs
- You can see what sets off each follow-up
- You can turn each kind on or off
- Changing a rule changes future messages the way you expect
Warning signs
- Messages appear with no visible reason
- You can’t change what sets them off
- A follow-up goes to someone it shouldn’t, such as a customer who already booked
- Ask the vendor
- Which events start a follow-up, and can I turn each one on or off?
2 What it says
Whether a person or an AI writes the message, it speaks for your business and should stay inside your rules.
- Try this
- Read several scheduled messages for different test customers. Change a template or the rules behind the wording, and check that the next message reflects it.
Good signs
- You can see the exact text, before it’s sent or afterwards
- Messages stick to what you allow, such as prices and promises
- You can change the wording or the rules behind it
Warning signs
- Messages promise things you haven’t approved
- You can’t see what will be or was sent
- A message ignores a change in the customer’s situation, such as a cancelled booking, a question already answered or an updated quote
- Ask the vendor
- Can I review messages before they’re sent, or only afterwards? How do I change what they say?
3 What’s scheduled and what was sent
You can’t fix what you can’t see. A record of each customer’s messages is how you catch a mistake before a customer does.
- Try this
- For one test customer, find every message that’s scheduled and every one already sent, with its time and channel.
Good signs
- A list of upcoming and past messages for each customer
- Times shown in your time zone, or clearly labelled
- You can keep or export the history
Warning signs
- No record once a message has gone
- You only find out what was sent from the customer
- Ask the vendor
- Where can I see scheduled and sent messages, and how long is that history kept?
4 Pause, edit or cancel, including when plans change
Plans change. A reminder for a visit that has moved or been cancelled does more harm than no reminder at all.
- Try this
- Move a test appointment, then cancel it, and check what happened to the messages tied to it. Then pause follow-ups for that one customer.
Good signs
- Moving or cancelling a visit updates or stops its messages
- You can pause or cancel one message, one customer, or everything
- An edit made before the send time is the version that goes out
Warning signs
- A reminder goes out for a cancelled visit
- Cancelling one message leaves related ones still scheduled
- There’s no quick way to stop sending
- Ask the vendor
- When an appointment changes, what happens to messages already scheduled for it?
5 Opt-outs and consent
Customers need an easy way to say no, and the tool should record what they said and act on it. What an opt-out covers depends on the channel, the kind of message and where you and your customers are; if you’re in the US, see the box below.
- Try this
- From a test number, reply STOP, and separately reply in plain words, such as “please stop texting me.” From a test inbox, unsubscribe. Then look at what the tool recorded for that customer, and at which messages it still sends, on that channel and on others.
Good signs
- Each opt-out is recorded, with the channel and the kinds of message it covers
- Follow-ups the customer opted out of stop
- For anything still sent, the vendor can explain why that specific message is permitted for its channel and the preference the customer recorded
- The vendor explains how consent is collected and stored
Warning signs
- Follow-ups the customer asked to stop keep coming
- A plain-language request to stop is ignored
- You can’t see what a customer has opted out of, or whether an opt-out on one channel covers the others
- Ask the vendor
- How do customers opt out on each channel, and how is that recorded? Which messages, if any, still go out after an opt-out, and why? Does an opt-out on one channel affect the others? Is business texting registered with the carriers where that’s required?
6 Sensible timing
A useful message at the wrong hour can still annoy a good customer.
- Try this
- Schedule a test follow-up for late evening, for a customer in a different time zone from yours. See whether the tool holds it, warns you, or sends it.
Good signs
- You can set the hours when messages may go out
- Customers’ time zones are used, or clearly shown
Warning signs
- Messages can go out at any hour, with no control
- Time zones are ignored
- Ask the vendor
- Can I set sending hours, and whose time zone do they use?
7 Replies are handled and a person can take over
A follow-up invites an answer. Routine replies can be handled automatically within your rules, but a customer who asks for a person should reach one.
- Try this
- Reply to a test message with a routine question, such as your opening hours. Then reply asking to speak to someone.
Good signs
- Routine replies get a correct answer within your rules, or reach you
- A request for a person reaches you or your team, and someone can take over the conversation
- The customer’s record shows the replies
Warning signs
- Replies go somewhere nobody watches
- A request to speak to someone gets only more automated answers
- Scheduled follow-ups carry on as if the customer hadn’t replied
- Ask the vendor
- Which replies are handled automatically, where do the rest go, and how does a person take over?
8 Right customer, current details
Duplicate contacts, a changed phone number or old details can send the right message to the wrong person.
- Try this
- Create two test customers with similar names. Then change one’s phone number to another number you control, and check which messages go where and what the tool records about the new number.
Good signs
- Messages use the customer’s current details
- A new number is confirmed as the customer’s before follow-ups go to it, and permission to contact it is recorded for that number, not copied over because a field changed
- Duplicates are merged by rules you approve, automatically or after your review, with a record of each merge and a way to undo it
Warning signs
- A message goes to an old number
- Follow-ups go to a new number before anyone has checked it belongs to the customer
- One customer’s details appear in another customer’s message
- Contacts are merged with no record and no way to undo it
- Ask the vendor
- How does the tool handle duplicate contacts and changed numbers? When a number changes, how is it checked, and what happens to the customer’s consent?
Rules in the United States
US only, not global. Other countries have their own rules. This is general information, not legal advice.
- Texts and automated calls. The Federal Communications Commission sets rules on consent and on how customers can withdraw it. These rules have changed in recent years and may change again, so check the FCC’s current rules before relying on any detail.
- Marketing email. The Federal Trade Commission’s CAN-SPAM guide explains when commercial email needs an opt-out, and how messages that only confirm a transaction are treated differently.
- Telephone sales calls. Federal rules limit the hours for telephone solicitations, and some states set their own limits.
- Industry practice. CTIA, the US wireless industry association, publishes messaging guidelines that recommend clear opt-out instructions such as STOP. These are industry guidelines, not law.
What this checklist can’t tell you
It can’t tell you which product is best, and it can’t tell you whether a particular setup meets the rules that apply to you. Those depend on your channels, the kind of messages you send and where you and your customers are. Use the checks to see how a tool behaves, and the questions to get its answers in writing.
Planning the rest of your front desk? See our buyer checklist for AI receptionists.
Sources
All read on 4 October 2026. These are primary sources on US rules; they describe the rules, not how any product behaves.
- 47 CFR 64.1200, Electronic Code of Federal Regulations.
- FCC Report and Order on revoking consent to robocalls and robotexts (FCC 24-24).
- FCC order postponing part of the 2024 revocation rule (DA 26-12).
- The FCC’s 2026 order revising the revocation rules (FCC 26-67, CG Docket 02-278).
- CAN-SPAM Act: A Compliance Guide for Business, Federal Trade Commission.
- CTIA Messaging Principles and Best Practices (May 2023).
Change log: October 2026, first version.