A person gave a relative a signed blank cheque for a £1 lakh loan and has repaid half. They are now struggling to repay the remaining balance and fear the relative will present the cheque to cause it to bounce and file a case. While stopping payment is an option, it may not prevent a cheque bounce case under Section 138 of the NI Act. Experts advise attempting an amicable settlement with the relative, possibly involving elders, and highlight that cash transactions over £20,000 can be illegal. It's strongly advised against making false complaints and to consult a local lawyer for personalised guidance.