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Your Vat Number Authentication

PHP Developer
in General Chat

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It is possible to check whether a VAT registration number shown on an invoice is valid for example

 

Take any vat number like 339 0727 47

 

Each digit is multiplied by a number, starting with 8 and decreasing to 2

 

3 *8 = 24

3 *7 = 21

9 *6 = 54

0 *5 = 0

7 *4 = 28

2 *3 = 6

7 *2 = 14

 

Total=147

 

97 is subtracted from the sum as many times as is necessary to arrive at a negative number.

 

147-97=50, 50-97= -47

 

The negative number should be the same as the last 2 digits of the VAT registration number if it is valid.

 

Try this on your vat number

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