Check the validity of a VAT number without any HTTP request.

This go library is based on the original jsVAT for JS/TS.

The intention of this library is to offer to all gophers the ability to validate all the VAT numbers before they are stored in a database.

Go v1.17.x or newer (RECOMMENDED)

go install github.com/ltns35/go-vat

Go v1.16.x or older

go get -u github.com/ltns35/go-vat

• Check the validity of VAT numbers.
• Extendable with custom countries/rules
• Offline

// Check against all supported countries validators.
vatResult, err := vat.Validate("ADE000000E")
if err != nil {
// Handle error
}

// Check ONLY against Andorra validator.
countries := []countries.Calculer{
countries.Andorra,
}
vatResult, err = vat.Validate("ADE000000E", countries...)

// output: vatResult
//
//	{
//	   "value":"ADF000000F",
//	   "isValid":true,
//	   "isSupportedCountry":true,
//	   "country":{
//	      "name":"Andorra",
//	      "codes":[
//	         "AD",
//	         "AND",
//	         "020"
//	      ],
//	      "rules":{
//	         "multipliers":null,
//	         "typeFormats":null,
//	         "lookup":null,
//	         "check":"",
//	         "regex":[
//	            "^(AD)([fealecdgopuFEALECDGOPU]{1}\\d{6}[fealecdgopuFEALECDGOPU]{1})$"
//	         ],
//	         "additional":null
//	      }
//	   }
//	}
//

• Albania
• Andorra
• Argentina
• Austria
• Belarus
• Belgium
• Bolivia
• Brazil
• Bulgaria
• Canada
• Croatia
• Cyprus
• Czech Republic
• Denmark
• Ecuador
• Estonia
• Europe
• Finland
• France
• Germany
• Greece
• Guatemala
• Hungary
• Hong Kong
• India
• Indonesia
• Ireland
• Italy
• Kazakhstan
• Korea, Republic of
• Latvia
• Liechtenstein
• Lithuania
• Luxembourg
• Malaysia
• Malta
• Netherlands
• New Zealand
• Nigeria
• North Macedonia
• Norway
• Peru
• Poland
• Portugal
• Romania
• Russia
• San Marino
• Serbia
• Slovakia
• Slovenia
• Spain
• Sweden
• Switzerland
• Taiwan
• Turkey
• Ukraine
• United Kingdom
• Uruguay

If you need a country is not yet supported by the library open a new issue or create a pull request to be merged.

The library is tested against the 2 latest stable major versions of Go.

• 1.17.x
• 1.16.x

All the validators has been tested individually to ensure the correct working, if you need more tests don't hesitate to open a new issue with the values you want to be tested.

The library is under the MIT license, so you can use it for free for commercial products.