H

Confirmed breach

Hallmark data breach

Country being checked · hallmark.com

A breach of Hallmark was added to Have I Been Pwned’s breach database on 12 April 2026. It affected 1,736,520 accounts. Exposed: Email addresses, Phone numbers, Names, Addresses and Support tickets. The breach began on 31 March 2026, 12 days before it was reported.

Status

Confirmed breach

People affected

1,736,520 accounts

Reported

12 April 2026

Breach began

31 March 2026

Time to tell

12 days (the median in California’s notices over the last year: 154 days)

What was exposed

• Email addresses
• Phone numbers
• Names
• Addresses
• Support tickets

Sources

• Breach database · 12 April 2026 · 1,736,520 accountsHave I Been Pwned

Breach databases are read by code. · Corrections and changes

If Hallmark had your data

1. Look for Hallmark’s own notice or letter: it should say what of yours was involved. Keep it.
2. Expect scams that use your details: calls, texts or emails pretending to be Hallmark, your bank or the police. Never give codes or passwords, never approve a sign-in you did not start, never move money.

• Spot the scams that use leaked data →
• What to do after a data breach →

Email me if Hallmark has another breach

Alert me

One email to confirm first. We use your address only for this alert, and one click deletes it.

From the data breach tracker: official notices, breach databases and the news, every fact with its source. Open data (CC BY 4.0) · How the tracker works · Official registers · Corrections and changes · Found a mistake? Tell us and we correct it.