| due | (adjective) owed and payable immediately or on demand | - |
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| (adjective) suitable to or expected in the circumstances | - |
| (adjective) capable of being assigned or credited to | Synonyms: ascribable, imputable, referable |
| (adjective) scheduled to arrive | - |
| overdue | (adjective) past due; not paid at the scheduled time | Synonyms: delinquent |
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| undue | (adjective) not yet payable | - |
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| (adjective) not appropriate or proper (or even legal) in the circumstances | - |
| (adjective) beyond normal limits | Synonyms: excessive, inordinate, unreasonable |
| (adjective) lacking justification or authorization | Synonyms: unjustified, unwarranted |