What is my barcode?

With the recent Covid-19 pandemic, the Singapore government has mandated the use of SafeEntry NRIC check-ins to facilitate contact tracing. Before entering any store/ building, everyone is required to register their NRIC number either by the NRIC card, or using the SafeEntry app. This process is called the SafeEntry NRIC check-in. Singapore is the first in the world to implement a country-wide contact tracing system, and many countries have lauded Singapore for her efficiency and quick-thinking. When the mobile app for SafeEntry NRIC check-in was launched, many countries showed interest in the SafeEntry NRIC technology. Because of its prevalent use during this period, you must be wondering... What is a Valid NRIC Number? Is S981234A a valid NRIC number?  What about T9823212Z? The NRIC is used for many purposes in Singapore. While it may seem totally random, there is a actually formula behind how each NRIC number is generated. Here's a quick recap on the algorithm!  The structu...