One year claims made policy on a 5 year event

Client is due a payment in 5 years from the sale of a business. He wants to insure this payout through a captive that writes one year claims-made policies. My reaction was how can you insure something next year that can't happen for 5 years.



I guess the business could default and he could be effectively sure next year that he will not get payment.



Is there an issue with this?

One year claims made policy on a 5 year event