Scores of youngsters are owed a share of £394m that is still waiting to be claimed.
According to the UK's spending watchdog, 145,000 young people have failed to claim money invested for them in child trust funds (CTF). The National Audit Office raised concerns the accounts are at risk of becoming forgotten or lost track of by those holding them.
Estimates indicate that more than one-quarter of CTFs have remained untouched for a year or more after their owners turned 18. A CTF is a long-term tax-free savings account for children born between September 1 2002 and January 2 2011, which they can access when they turn 18.