noun, noun or participle which takes 'suru', transitive verb
deferred payment; postpayment
Used primarily in postal, shipping, or billing contexts where payment is made after delivery or service. Often seen in terms like 後納郵便 (deferred payment mail).
この郵便物は後納で送られています。
This mail is sent with deferred payment.
後納制度
If you use the deferred payment system, you can pay in a lump sum each month.