Method to check if you swapped 2 digits
Standard manual accounting trick employed when isolating an error in a double ledger.
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- 2026-10-10
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Benford's law en.wikipedia.org
Digit distribution can be a signal of accounting fraud.
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The Double-Entry Counting Method web.archive.org
Same premise as above, but way more detailed and complete, as it adds reporting and implementation details.
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Billed for ¥21,120, invoiced at ¥2,112,000 and paid ¥2,112,000 xunroll.com
Get rid of integers and floats for monetary values. Use decimals. Or face the risks of anomalous x100 charges.
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Twenty five thousand dollars of funny money web.archive.org
Same error as above at Google Ads, or the danger of separating your pennies from your dollars, where $250 internal coupons turned into $25,000. My advice: get rid of integers and floats for monetary values. Use decimals. Or fallback to strings and parse them, don't validate.
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Decimal Point Error in Etsy's Accounting System web.archive.org
The importance of types in accounting software: missing the decimal point ends up with 100x over-charges.
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Tutorial on multiple currency accounting mathstat.dal.ca
An excellent resource for implementing multi-currency accounting systems.
Billing › Fraud > Statistics: “Standard manual accounting trick employed when isolating an error in a double ledger.”