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For businesses we work with

Before we contact anyone for you

Last updated 31 October 2026

Your customers trust you. We protect that trust. Before a single message goes out, we go through this checklist with you. If your list doesn't pass, we'll say so and won't use it.

Please note: this is practical guidance based on UK GDPR and the Privacy and Electronic Communications Regulations (PECR). It isn't legal advice. If you're unsure about your situation, speak to a data protection adviser or see the ICO's guidance on direct marketing.

Who's responsible for what

Your business is the controller of your customers' and enquirers' information: you decide who is contacted and why, and you need a lawful reason to contact them. We are your processor: we only use the data on your written instructions, keep it secure, and return or delete it when we finish.

1. Your list

2. Permission to text or email

The rules depend on what the message is.

Messages about an existing booking (no extra permission needed)

Reminders and confirmations for appointments someone has already made are service messages, not marketing. Keep them to the booking and don't add offers.

Messages inviting people to book (marketing rules apply)

Texting or emailing an old enquiry or past customer to invite them in counts as direct marketing under PECR. You can only send it if, for each person, one of these is true:

If neither is true for someone, or you can't tell, we leave them out. That's the safe choice, and it protects your reputation.

If you're a clinic or health business

A list of clinic patients reveals that people have used a health service, which is sensitive "special category" data under UK GDPR. We keep every message to booking and logistics, never mention test results or conditions, and send nothing that would embarrass someone if a family member saw it. We recommend you record why you're comfortable contacting each group, and consider a short data protection impact assessment (DPIA). We can give you a template.

3. Phone calls

4. Paperwork

5. How we send (our standards)

6. When we finish

Questions about any of this? Email hq@osix.co.uk and we'll talk it through.