Client blacklists: can you warn colleagues?

01The temptation

A client missed three appointments, didn't pay and then sent a nasty message.In a group chat with colleagues, someone asks: “Isn't it time we kept a shared blacklist?” The idea is understandable. Nobody wants to go through that twice, and warning others feels fair.

But a list with someone's name, phone number and “unreliable” is personal data, and sharing it is processing with rules attached. This article covers what is fairly safe, what is risky and what to do instead. It isn't legal advice. For a specific situation, ask a lawyer or your data protection authority.

02Your own notes: usually fine

A business may keep what it needs for its work: that a client missed two visits, or that you'll ask them for a deposit from now on. The basis here is your legitimate interest in organising bookings. Keep three things in mind:

• Facts, not judgements. “Missed 12.03 and 02.04”, not “liar and a mess”.
• Your team only. Nobody outside the business sees the notes.
• No longer than needed. Old notes about something long settled aren't needed.

Remember a client can ask to see their data. Write so you wouldn't mind them reading it. More on keeping data is in Client data and GDPR: what a master may keep and for how long.

03Sharing with colleagues: risky

Once a client's name and number reach another business, you are disclosing personal data to a third party. You need a legal basis for that, and the person should know about it. “I wanted to warn others” doesn't settle the question on its own.

Practical risks worth weighing:

• A complaint. The person can demand deletion and go to the data protection authority.
• Reputation. A claim like that about someone may turn out wrong, and you'd have to be able to prove it.
• The wrong person. Same name, changed number, reassigned phone. Nothing on a list checks that.
• An unfair label. One missed visit because of illness can make someone a “bad client” across town.

04In public: don’t

An Instagram story with a client's name or photo saying “watch out for this person” is the worst option. Strangers see it, you can't recall every copy, and the person can demand deletion. Even if you're right, it looks bad to your other clients too, who think: “What would they write about me?”

05Test yourself

06What to do instead

The goal isn't to punish someone but to protect your calendar. That takes three things, and none needs a shared list:

1. A deposit from new clients. Whoever doesn't show loses the deposit. You can't trust a stranger further than that anyway.
2. A stricter rule of your own for those who missed visits. Prepayment or manual approval.
3. A calm refusal. You don't have to take everyone. How to do it is in How to stop taking a client, calmly and lawfully.

07How it works in RINDIQ

In RINDIQ all of these tools live only in your account. Client data isn't shared with other businesses.

• Client notes are visible only to your team after logging in.
• The reliability score (on Professional and Business) counts no-shows and late cancellations, and below your threshold can ask for prepayment or approval.
• The booking limit on the client's page: at 0 the client can't book online and sees a request to contact you. You can still book them yourself.