diff --git a/README.md b/README.md
index 5b00ceb71..54806336b 100644
--- a/README.md
+++ b/README.md
@@ -115,7 +115,7 @@ Validator | Description
**isHexColor(str)** | check if the string is a hexadecimal color.
**isHSL(str)** | check if the string is an HSL (hue, saturation, lightness, optional alpha) color based on [CSS Colors Level 4 specification](https://developer.mozilla.org/en-US/docs/Web/CSS/color_value).
Comma-separated format supported. Space-separated format supported with the exception of a few edge cases (ex: `hsl(200grad+.1%62%/1)`).
**isIBAN(str)** | check if a string is a IBAN (International Bank Account Number).
-**isIdentityCard(str [, locale])** | check if the string is a valid identity card code.
`locale` is one of `['LK', 'PL', 'ES', 'IN', 'IT', 'IR', 'MZ', 'NO', 'TH', 'zh-TW', 'he-IL', 'ar-LY', 'ar-TN', 'zh-CN']` OR `'any'`. If 'any' is used, function will check if any of the locals match.
Defaults to 'any'.
+**isIdentityCard(str [, locale])** | check if the string is a valid identity card code.
`locale` is one of `['LK', 'PL', 'ES', 'FI', 'IN', 'IT', 'IR', 'MZ', 'NO', 'TH', 'zh-TW', 'he-IL', 'ar-LY', 'ar-TN', 'zh-CN']` OR `'any'`. If 'any' is used, function will check if any of the locals match.
Defaults to 'any'.
**isIMEI(str [, options]))** | check if the string is a valid IMEI number. Imei should be of format `###############` or `##-######-######-#`.
`options` is an object which can contain the keys `allow_hyphens`. Defaults to first format . If allow_hyphens is set to true, the validator will validate the second format.
**isIn(str, values)** | check if the string is in a array of allowed values.
**isInt(str [, options])** | check if the string is an integer.
`options` is an object which can contain the keys `min` and/or `max` to check the integer is within boundaries (e.g. `{ min: 10, max: 99 }`). `options` can also contain the key `allow_leading_zeroes`, which when set to false will disallow integer values with leading zeroes (e.g. `{ allow_leading_zeroes: false }`). Finally, `options` can contain the keys `gt` and/or `lt` which will enforce integers being greater than or less than, respectively, the value provided (e.g. `{gt: 1, lt: 4}` for a number between 1 and 4).
diff --git a/src/lib/isIdentityCard.js b/src/lib/isIdentityCard.js
index b004803b8..9dc1302ad 100644
--- a/src/lib/isIdentityCard.js
+++ b/src/lib/isIdentityCard.js
@@ -63,6 +63,26 @@ const validators = {
return sanitized.endsWith(controlDigits[number % 23]);
},
+ FI: (str) => {
+ // https://dvv.fi/en/personal-identity-code#:~:text=control%20character%20for%20a-,personal,-identity%20code%20calculated
+ assertString(str);
+
+ if (str.length !== 11) {
+ return false;
+ }
+
+ if (!str.match(/^\d{6}[\-A\+]\d{3}[0-9ABCDEFHJKLMNPRSTUVWXY]{1}$/)) {
+ return false;
+ }
+
+ const checkDigits = '0123456789ABCDEFHJKLMNPRSTUVWXY';
+
+ const idAsNumber = (parseInt(str.slice(0, 6), 10) * 1000) + parseInt(str.slice(7, 10), 10);
+ const remainder = idAsNumber % 31;
+ const checkDigit = checkDigits[remainder];
+
+ return checkDigit === str.slice(10, 11);
+ },
IN: (str) => {
const DNI = /^[1-9]\d{3}\s?\d{4}\s?\d{4}$/;
diff --git a/test/validators.js b/test/validators.js
index 33b85a7a1..d737f2280 100644
--- a/test/validators.js
+++ b/test/validators.js
@@ -4874,6 +4874,20 @@ describe('Validators', () => {
'Z1234567C',
],
},
+ {
+ locale: 'FI',
+ valid: [
+ '131052-308T', // People born in 1900s
+ '131052A308T', // People born in 2000s
+ '131052+308T', // People born in 1800s
+ '131052-313Y',
+ ],
+ invalid: [
+ '131052308T',
+ '131052-308T ',
+ '131052-308A',
+ ],
+ },
{
locale: 'IN',
valid: [