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Now you can validate VAT using the European service called VIES, to ensure it exists. Only require this gem and call validate_as_vat_number on your VAT field, in an Active Record object.

installgem install validates_as_vat_number -v 1.0.3
Authors

Alessandro Dal Grande, Marco Sanson

4,279 total downloads 782 for this version
Owners

310432e49bbba94f4b06f4c5d345fe9a

Gemfile
gem "validates_as_vat_number", "~> 1.0.3"
Versions
  1. 1.0.4 March 8, 2010
  2. 1.0.3 February 28, 2010
  3. 1.0.2 February 18, 2010
  4. 1.0.1 February 18, 2010
  5. 1.0.0 January 6, 2010
Development Dependencies
  1. rspec >= 1.2.9