GDPR and business cards in the UK Keeping the card is one law. Emailing is another.

UK GDPR decides whether you can keep someone’s details. PECR decides whether you can send them marketing email. Most confusion comes from treating them as one rule.

Kai, Founder of Cardr · 8 min read

A Cardr Apple Wallet pass in the oxford design, its QR code linking to this post

Yes, you can usually keep the details from a business card and write to the person about what you discussed. Storing them falls under UK GDPR, and legitimate interests is the likely lawful basis, because someone who hands you a card expects to hear from you. Sending them marketing email falls under PECR: to an address at a limited company or LLP you can without consent, as long as you say who you are and offer an opt-out; to a sole trader, an ordinary partnership or a personal address you need their consent or the soft opt-in. Anything they asked you to send is not restricted by those rules. This is a plain reading of the ICO’s guidance, not legal advice.

Two laws, two questions.

UK GDPR covers holding and using personal data. PECR covers sending electronic marketing. A business card touches both, at different moments.

A name on a work email address is personal data. The ICO says so directly in its business-to-business marketing guidance: “If you can identify an individual either directly or indirectly it will constitute personal data even if they are acting in their business capacity.” So jordan.hale@company.co.uk is covered by UK GDPR, even though it belongs to a company.

PECR is narrower. It only bites when you send unsolicited direct marketing by electronic mail, and it treats people differently depending on whose address it is.

Which law answers which question about a business card
QuestionWhich lawShort answer
Can I save their details? UK GDPR Usually, under legitimate interests
Can I send them what they asked for? PECR, solicited Yes. PECR’s email rules cover unsolicited marketing
Can I send marketing to their company address? PECR, corporate subscriber Yes without consent, if you identify yourself and offer an opt-out
Can I send marketing to a sole trader or a personal address? PECR, individual subscriber Only with consent or the soft opt-in
What if they say stop? UK GDPR and PECR Stop, and keep a note so it stays stopped

From the ICO’s B2B marketing, electronic mail marketing and legitimate interests guidance, read 23 September 2026. Not legal advice.

Keeping the card.

Legitimate interests is the lawful basis that usually fits, and the ICO sets out a three-part test for it.

The ICO’s guide to legitimate interests breaks it into three questions: are you pursuing a legitimate interest, is using the information necessary for it, and do the person’s interests override yours? The deciding factor is usually expectation. In the ICO’s words, their interests are likely to override yours if “they wouldn’t reasonably expect you to use their information” that way.

Someone who hands you a card at an event expects you to save it and get in touch about the conversation. They probably do not expect to be added to a mailing list, sold to a third party or kept on file for ten years. The basis covers the first and not the rest.

  • Write it down. The ICO recommends a short legitimate interests assessment, which it describes as a light-touch risk assessment. For one person keeping contacts from events it can be short.
  • Tell them. The right to be informed says privacy information is given “at the time you collect their personal data”, with exceptions, including where they already have it.
  • Stop if they object to marketing. The ICO’s legitimate interests guide says the right to object to direct marketing is absolute. Keep a note so they are not emailed again.

Can I email them?

It depends on what the email is and whose address it goes to. Read down until a line matches.

Can I email them? Read down until a line is your situation.

  • They asked you to send something: the deck, the article, a quote Send it The ICO calls a message “solicited” when someone specifically asks for it, and PECR’s email rules apply to unsolicited marketing. Its own example: someone asks for your summer brochure.
  • The email promotes something they did not ask about It is marketing The ICO’s example of unsolicited marketing is a follow-up about a new offer that was not requested. Which rule applies depends on the address, below.
  • The address belongs to a limited company, LLP or Scottish partnership Allowed with an opt-out No consent needed under PECR for corporate subscribers. Say who you are, give a working opt-out, and honour it.
  • A sole trader, an ordinary partnership or a personal address Consent or soft opt-in These are individual subscribers. Without consent you need all three soft opt-in conditions, including an opt-out offered when you took their details.
  • You want to follow up properly and keep a record Cardr The exchange tells them where their details go, and the contact, your notes and the export stay yours on the free plan. The email is still yours to judge.

The corporate route is wider than people expect and narrower than they hope. The ICO’s electronic mail guidance lists corporate subscribers as “a company, Scottish partnership, limited liability partnership or government body”. But the key concepts page puts sole traders and ordinary partnerships with individuals, so a plumber trading under their own name at a Gmail address gets the full protection. And UK GDPR still applies to a named person at a company, so an objection still has to be honoured.

The soft opt-in, precisely.

The exception that lets you email an individual without consent. All three conditions, not one of them.

Regulation 22(3) of PECR allows marketing email to an individual where you got their details “in the course of the sale or negotiations for the sale of a product or service” to them, the marketing is about your “similar products and services only”, and they were given a simple way to refuse when the details were collected and in every message since.

The ICO’s compliance guidance gives examples of negotiations: asking for a quote, asking for more details about a product, signing up for a free trial. It does not mention business cards or networking events. Handing you a card is not, on its own, on that list; asking you what you would charge for the job they described is closer to it.

The condition people miss at events is the first opt-out. It has to be offered when you collect the details, not only in the first email. If you want to rely on the soft opt-in, offer the choice then, and write down that you did.

Several of these ICO pages say they are under review.The ICO notes that, because of changes made by the Data (Use and Access) Act, its guidance “is under review and may be subject to change”. Regulation 22 as published now also carries a separate soft opt-in for charities. Check the pages again before you build a process on them.

Where Cardr fits in.

Cardr helps with the first question and says plainly that the second is yours.

When someone sends you their details through the Save sheet on your card page, the form tells them: “Your details go to [your name] and are stored in their Cardr contacts. You can ask us to delete them at any time.” That is privacy information given at the moment of collection. It is not consent to marketing, and there is no marketing tick box on it.

Our terms are direct about the rest: “If you use Cardr to gather other people’s details, you are a data controller for those details and the law applies to you.” Every contact can be exported to CSV or vCard and deleted, on the free plan. The Pro follow-up reminder goes to you, not to them, and an AI draft is a draft you read and send yourself. What goes in it is your decision under the rules above.

For what to actually write, our UK follow-up email templates are built around the thing you promised, which is the most defensible reason to write there is. The wider picture of cards is on our digital business cards guide.

Questions, answered.

Is it legal to email someone whose business card you were given in the UK?

Usually yes, for anything they asked you to send or that continues the conversation. Marketing email is where PECR applies: a limited company or LLP address can be sent marketing without consent if you identify yourself and offer an opt-out; a sole trader, ordinary partnership or personal address needs consent or the soft opt-in. This is not legal advice.

Does GDPR apply to business contact details?

Yes, when they identify a person. The ICO says contact details that identify an individual are personal data even when that person is acting in a business capacity.

What lawful basis covers storing business cards?

Usually legitimate interests. The ICO sets a three-part test: a legitimate purpose, a use that is necessary for it, and a balance against the person’s interests, which turns largely on what they would reasonably expect. Someone who hands you a card expects you to keep it and follow up.

Can I add people from business cards to my newsletter?

Not automatically. A newsletter is marketing, so for individuals, sole traders and ordinary partnerships you need their consent or the soft opt-in, which needs a sale or negotiations for one, your own similar products, and an opt-out offered at collection and in every email. For limited company addresses PECR does not require consent, but they must be able to opt out.

Does the soft opt-in apply if someone gave me their card at a networking event?

Not from the card alone. It needs the details to have been collected during a sale or negotiations for a sale, which the ICO illustrates with asking for a quote or more details, and you must have offered a way to refuse marketing at the time. The ICO’s guidance does not mention business cards.

Are sole traders treated as businesses under PECR?

No. The ICO groups sole traders and ordinary partnerships with individuals, so they get the same protection as a private person. Limited companies, LLPs, Scottish partnerships and government bodies are corporate subscribers.

Do I need a privacy notice for contacts from business cards?

The ICO’s right to be informed guidance says privacy information is given at the time you collect data from someone, with exceptions including where they already have it. A short explanation of what you keep and why, available when asked, is a sensible minimum.

Get started

Free forever. About a minute to build.

Nothing for the other person to install, and no card details to start.

Create my free card