In 1988, Thomas Heck Jr. signed a “perpetual 90-day note” that said his obligation to repay a $51,000 loan from Paul Heck would “renew automatically in full force” even if Paul never made any demands and Thomas never made any payments. And Paul didn’t ask for repayment until 2017, after Thomas died without having paid down the debt.When Paul sued Thomas’ estate in 2018, there was some confusion about which version of the 10-year statute of limitations set by Section 13-206 of the …