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Contact verification and data cleansing

How MarketHype keeps your contact data clean: validation, duplicate prevention, and verification against public registries.

Written by Zaklina Udovicic

Quick summary

  • MarketHype automatically validates, cleans, and (in supported countries) verifies and enriches contact data when it enters the platform.

  • Validation includes email and phone format checks and filtering out invalid contact details.

  • MarketHype helps prevent duplicates by trying to match and update existing contacts instead of creating new ones.

  • Verification works by matching contacts to public registries and requires enough identifying data.

  • A matched contact is monitored for changes (for example, address changes).

What happens to data added to MarketHype

Keeping your contact data clean helps you reach the right people, reduce bounces, and get more accurate reporting.

Any contact data added to MarketHype (via a ticketing/booking system integration, signup form, import, or custom integration) goes through an automated process that includes:

  • Email and phone validation (format checks)

  • Duplicate prevention (merging where possible)

  • Verification and enrichment by matching to public registries (in supported countries, when enough identifying data is provided)

Email and phone number validation

Customer-provided contact details sometimes contain typos or invalid formats. Invalid email addresses and phone numbers cannot be used for communication, so they are filtered out as part of the validation step.

MarketHype also maintains a list of domain names commonly used for temporary email addresses and providers that no longer exist. Email addresses using these domains are filtered out to help keep your database accurate and reduce bounce rates.

ℹ️ Note: Validation checks that an email address or phone number is correctly formatted. Verification matches a contact to a real person in a public registry. They happen at different stages, and a contact can pass one without the other.

Duplicate prevention

Duplicates make it harder to understand a person’s full purchase and communication history. When new contact information is added, MarketHype looks for existing contacts and attempts to update them rather than create new ones.

In MarketHype, an email address or phone number can only be associated with one contact card.

Verification and enrichment

In supported countries, MarketHype can verify contact details by matching them against real people in public registries. When a match is found, MarketHype can:

  • Correct certain errors in contact details

  • Enrich the contact with additional information available in the registry

What can be added varies by country, but may include parts of the person’s name, postal address, and other registry-available details, such as age and gender.

💡 Tip: Want to get to know your audience even better? With our premium add‑on Lifestyle insights, you can enrich contacts with attributes like life stage, purchasing power, and education level. Learn more: Lifestyle insights.

Information required for verification

Verification works best when you have collected at least one of the following combinations:

  • Full name + full postal address, or

  • Full name + birth date (where available)

Having all of the above (full name, full postal address, birth date), as well as a phone number, typically improves the match rate.

Monitoring for future changes

When a contact is matched to a real person in a public registry, MarketHype also monitors that record for changes. If the registry is updated – for example, an address change – the contact in MarketHype is updated automatically.

ℹ️ Note: Verified contacts can't be updated through a manual import. Their details are kept up to date by the registry instead.

If a monitored record becomes protected or otherwise unavailable, the contact is automatically deleted and excluded from future communication. Read more in How to: Delete contacts.

Where to see verification status

Open a contact card in Audience → Contacts. Verified contacts have a green check next to their name, which means the contact was matched to a real person and their details were verified against a public registry.

Contacts that couldn't be matched are still added to your MarketHype database. Their details can be updated the next time the person makes a purchase, you import new information, or they submit an updated signup form.

Read more about the contact card in How to: Manage contacts.

Country support

Verification and monitoring are only available for residents of certain countries.

Country

Verification

Monitoring

Sweden

✅

✅

Norway

✅

✅

Denmark

✅

✅

Finland

✅

✅

Iceland

❌

❌

When a contact is verified, their contact card is updated with the following details:

Country

Full name

Postal address

Age

Gender

Sweden

✅

✅

✅

✅

Norway

✅

✅

✅

✅

Denmark

✅

✅

❌*

✅

Finland

✅

✅

✅

✅

* Birth date is not available in Danish public registries, so it is not added automatically as part of verification for Danish contacts. If you want to store birth date for these contacts, you need to collect and add it manually, for example via checkout fields, signup forms, or a manual import.


Signup forms and spam bots

In addition to cleansing, MarketHype uses double opt-in for signup forms to reduce spam. Read more about double opt-in here.

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