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# Faker::IdNumber
```ruby
# Generate a valid US Social Security number
Faker::IdNumber.valid #=> "552-56-3593"
# Generate an invalid US Social Security number
Faker::IdNumber.invalid #=> "311-72-0000"
# Generate a Spanish citizen identifier (DNI)
Faker::IdNumber.spanish_citizen_number #=> "53290236-H"
# Generate a Spanish foreign born citizen identifier (NIE)
Faker::IdNumber.spanish_foreign_citizen_number #=> "Z-1600870-Y"
# Generate a valid South African ID Number
Faker::IdNumber.south_african_id_number #=> "8105128870184"
# or
Faker::IdNumber.valid_south_african_id_number #=> "8105128870184"
# Generate an invalid South African ID Number
Faker::IdNumber.invalid_south_african_id_number #=> "1642972065088"
# Generate a Brazilian citizen number (CPF)
# Keyword arguments: formatted
Faker::IdNumber.brazilian_citizen_number #=> "53540542221"
Faker::IdNumber.brazilian_citizen_number(formatted: true) #=> "535.405.422-21"
# Generate a Brazilian ID Number (RG)
# Keyword arguments: formatted
Faker::IdNumber.brazilian_id #=> "493054029"
Faker::IdNumber.brazilian_id(formatted: true) #=> "49.305.402-9"
# Generate a Chilean ID (Rut with 8 digits)
# For more advanced cases, please refer to Faker::ChileRut
Faker::IdNumber.chilean_id #=> "15620613-K"
# Generate a Croatian ID number (OIB)
# Keyword arguments: international
Faker::IdNumber.croatian_id #=> "88467617508"
Faker::IdNumber.croatian_id(international: true) #=> "HR88467617508"
# Generate a Danish ID number (CPR)
# Keyword arguments: formatted, gender, birthday
Faker::IdNumber.danish_id_number #=> "050390-9980"
Faker::IdNumber.danish_id_number(formatted: true) #=> "050390-9980"
Faker::IdNumber.danish_id_number(birthday: Date.new(1990, 3, 5)) #=> "050390-9980"
Faker::IdNumber.danish_id_number(gender: :female) #=> "050390-9980"
# Generate a valid French Social Security number (INSEE number)
Faker::IdNumber.french_insee_number #=> "22510589696868"
```
## ID Number and Locales
Besides the default ID numbers, faker supports localized `.valid` and `.invalid` values:
```ruby
Faker::Config.locale = 'fr-FR'
Faker::IdNumber.valid #=> "22510589696868"
```
Locales with specific intricacies are as such:
### en-GB
When the locale is set to British English, unformatted [National Insurance](https://www.gov.uk/national-insurance/your-national-insurance-number) numbers are generated:
```ruby
Faker::Config.locale = 'en-GB'
Faker::IdNumber.valid #=> "AJ405924A"
Faker::IdNumber.invalid #=> "BG316764W"
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