You get a call from your bank saying there has been suspicious activity on your account. The caller reads out your name, address and date of birth, and because those details match, you are reassured that the caller is legitimate.
But those same details — especially a date of birth — can be woven into a wider verification script by criminals to gain trust and extract more sensitive information. Once fraudsters have a few seemingly personal facts, they can impersonate banks, utilities or other services and persuade people to transfer money, reveal passwords, or reset account credentials.
Why your date of birth matters
A date of birth is widely used as a simple authentication factor. It is also often easy to find: many people list birthdays on social media, and data brokers and public records can make such details readily accessible. Because it feels personal, hearing a DOB read back during a call can lower a target’s guard and lend apparent legitimacy to a request.
Practical steps to limit risk
One straightforward defensive move is to avoid supplying your real DOB when it is not strictly necessary — for example by leaving the field blank or using a different birth date when creating online accounts. Doing so can make it harder for attackers to assemble the pieces they need to impersonate you. At the same time, be aware this approach can complicate account recovery and may conflict with some services’ terms, so weigh the trade-offs for each provider.
Other precautions include tightening privacy settings on social media, removing or limiting publicly visible date-of-birth information, and using stronger authentication methods such as two-factor authentication rather than relying on static personal details. When contacted by someone claiming to be from a bank or other institution, hang up and call back using an official number from the organisation’s website or your account statements.
Financial institutions and service providers also bear responsibility: organisations should avoid relying solely on easily obtainable facts for identity checks and should offer secure alternatives. For individuals, reducing the circulation of straightforward personal identifiers is a simple, practical step that can lower the chance of becoming a target for social-engineering scams.