jat1壹
Jyutpingjat1
Yaleyāt
Definition
The banker's anti-fraud numeral for one, commonly written as 一.
writtenmoneynumbers
How it's used
Used almost exclusively in formal financial documents like cheques, contracts, or receipts to prevent tampering. Because the standard numeral 一 is easily altered into 二 or 三 by adding extra strokes, these complex characters are mandatory for legal clarity. You will rarely encounter this in casual speech unless you are specifically discussing banking procedures or document security.
Examples
Related words
Common mistake
Do not use this in everyday counting or casual writing, as it sounds overly formal and archaic. It is strictly a security measure for written documents rather than a standard way to express the number one.
Grammar color guide
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Grammar guides
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