Slick helps you manage client communication preferences in line with GDPR requirements, so you can safely send messages while respecting client choices.
How SMS opt-outs work
There are two ways a client can opt out, and they behave differently:
1. Opting out of marketing (via link)
When you first send a marketing message, Slick automatically includes a GDPR-compliant opt-out link.
If a client clicks this link:
They are opted out of marketing messages only (auto client SMS, text blast SMS).
They will still receive:
Appointment reminders
Digital appointment cards
In the client profile you will see -
SMS reminders = still on
Marketing = off
2. Opting out of all SMS (replying STOP to Slick SMS)
If a client replies STOP or OPT OUT to any message:
They are opted out of all SMS messages
They will no longer receive:
Reminders
Marketing
Any other messages
This is handled by Twilio, our messaging partner, and can’t be overridden in Slick.
In the client profile:
SMS reminders = off
Marketing = off
Important to note!
How clients can opt back in
If they replied STOP:
They can reply START to receive all messages again.
If they only want to stop marketing:
They should contact you to be opted out of marketing only via the client profile.
GDPR & SMS credits
The first marketing SMS you send to a client includes an opt-out message (required by law).
This means:
1 message = 2 SMS credits (message + opt-out message).
Sending marketing safely
To avoid messaging the wrong clients:
Use the “Only show clients opted-in for marketing” filter when building audiences.
This ensures you only contact clients who have agreed to receive marketing or have not actively opted out.
Once a client opts out of marketing:
They won’t receive marketing messages again unless they opt back in
Multi-location behaviour
Client preferences are specific to each salon:
If a client opts out at one salon then it only applies to that salon.
They can still receive messages from other salons using Slick.
If you’re unsure about a client’s status, check their profile for their latest SMS preferences.