person in arrears; non-payer; delinquent payer
Refers to someone who has failed to pay taxes, bills, rent, or other obligations by the due date. Often used in official or financial contexts.
A reminder letter is sent to those in arrears.
Tax delinquents must pay late fees.
債務者 is a broader term for 'debtor', while 滞納者 specifically means someone who is behind on scheduled payments.
Compound of 滞納 (delinquency in payment) + 者 (person).