IOU

Etymology
From the pronunciation of "I owe you". Attested since at least 1618.

Phrase

 * 1) I owe you.
 * Customarily, if you borrow $10 for lunch from a coworker, writing IOU $10 on a yellow sticky note acts as a legal promissory note that you will repay said amount on payday.

Noun

 * 1) An informal promissory note that is not a negotiable instrument.
 * When David couldn’t afford to match the money in the poker pot, he added an IOU for the remaining amount instead.

Translations

 * Danish: skylderklæring
 * Dutch: schulderkenning,
 * Finnish:
 * French:
 * German:, Schuldanerkennung
 * Greek:
 * Italian: riconoscimento di debito
 * Japanese: 借用書
 * Latin: syngrapha
 * Plautdietsch: Schultbewiess
 * Polish: kwit dłużny, skrypt dłużny
 * Romansch: renconuschientscha dal debit
 * Russian:
 * Spanish: reconocimiento de deuda
 * Swedish: enkelt skuldebrev
 * Welsh: dylednod