Greek TIN/AFM Validator and Generator

Validate and generate Greek TIN (Tax Identification Number) / AFM (Αριθμός Φορολογικού Μητρώου). Generation function can create valid or invalid numbers including parameters for old format, individuals, legal entities and repet tolerance digits control.

Online demo and presentation

https://lytrax.io/blog/projects/greek-tin-validator-generator

Installation

Using NuGet Package Manager Console:

# Add the Lytrax.AFM package to the default project as specified in the console's project selector
Install-Package Lytrax.AFM

# Add the Lytrax.AFM package to a project named <MyProject> that is not the default
Install-Package Lytrax.AFM -ProjectName <MyProject>

Usage

Import:

using Lytrax.AFM;

Validate a number:

> ValidateAFM.Validate("090000045")
true

> ValidateAFM.Validate("123456789")
false

Generate a valid number:

> GenerateAFM.GenerateValid()
"731385437"

Generate an invalid number:

> GenerateAFM.GenerateInvalid()
"853003357"

API

Class ValidateAFM

• Validate static boolean function
  • afm: string - A number to be checked
  • Returns: bool - A boolean result indicating the validation of the number
• ValidateExtended static ValidateAFMExtendedResult function
  • afm: string - A number to be checked
  • Returns: ValidateAFMExtendedResult - Result indicating the validation of the number
• constructor instantiates a new ValidateAFM object
  • afm: string - A number to be checked
• Number string property - The current AFM number the class object contains
• Valid bool property - A boolean result indicating the validation of the current number the class object contains
• Error string property - A string result indicating the error if the current number the class object is invalid.
  It can be empty or "length" or "nan" or "zero" or "invalid"

Class ValidateAFMExtendedResult

• constructor instantiates a new ValidateAFMExtendedResult object
  • valid: bool - Boolean indicates whether a number is valid or not
  • error: string - A string indicating the error if the number is invalid.
    It can be "length" or "nan" or "zero" or "invalid"
• Valid boolean property - Whether a number is valid or not
• Error string property - Empty or "length" or "nan" or "zero" or "invalid"

Example:

> ValidateAFM.ValidateExtended("ab1234")
ValidateAFMExtendedResult { Error="length", Valid=false }

Class GenerateAFM

• Generate static string function
  • forceFirstDigit: int? = null - If specified, overrides all pre99, legalEntity and individual
  • pre99: bool = false - Για ΑΦΜ πριν από 1/1/1999 (ξεκινάει με 0),
    (if true, overrides both legalEntity and individual)
  • individual: bool = false - Φυσικά πρόσωπα, (ξεκινάει με 1-4)
  • legalEntity: bool = false - Νομικές οντότητες (ξεκινάει με 7-9)
  • repeatTolerance: int? = null - Number for max repeat tolerance (0 for no repeats, unspecified for no check)
  • valid: bool = true - Generate valid or invalid AFM
  • Returns: string - A valid or invalid 9 digit AFM number

Example:

> GenerateAFM.Generate(forceFirstDigit: 3, repeatTolerance: 1, valid: true)
"335151580"

• GenerateValid static string function - Same as Generate with valid force and override to true
  • Returns: string - A valid 9 digit AFM number

Example:

> GenerateAFM.GenerateValid(pre99: true)
"070825250"

• GenerateInvalid static string function - Same as Generate with valid force and override to false
  • Returns: string - An invalid 9 digit AFM number

Example:

> GenerateAFM.GenerateInvalid(legalEntity: true)
"877577341"

Test

Clone this repository:

git clone https://github.com/clytras/afm-dotnet.git && cd afm-dotnet

Open Src\Lytrax.AFM\Lytrax.AFM.sln using Visual Strudio and run tests.

To run Demo, run console application Lytrax.AFM.Demo.

Changelog

See CHANGELOG

License

MIT License - see the LICENSE file for details