non-refundable(о сумме) Такой вариант зачастую требует изменения структуры предложения, например: The Resident agrees to pay to the Owner a non-refundable fee of $500 – ...уплачивает сумму в размере 500$. Указанная сумма возврату не подлежит.4uzhoj)
non-returnable(The example clause given below provides that one party must pay a non-returnable deposit to the other party. Party A shall pay to Party B a deposit in the sum of [ ] within seven (7) days of the date of signature of this agreement. If Party A fails to pay the balance of the Contract Price by [insert date] or seeks to terminate the Order, Party B may retain all of the deposit. LE2 Alexander Demidov)