Why is it important to get the employee's personal details right?

National Insurance number, surname, full forenames, date of birth and gender are sent to HMRC and used by them to match against the employee's NI contribution record. If these fields do not match the information held by HMRC, your employee may lose out on their entitlement to benefits, pensions and universal credits. For this reason, HMRC recommends you check these details against official documents, such as passports and NI cards.