Birth year

[stef-iula]

Python version
3.8.6

Package version
0.3.7

Current behavior (bug description)
Tax codes with "21" as birth year are decoded as 2021

Expected behavior
Tax codes with "21" as birth year decoded correctly as 1921 or 2021

[fabiocaccamo]

@stef-iula do you have any idea regarding how to solve this problem?

[stef-iula]

@fabiocaccamo to be honest I haven't looked yet into your code nor in any of the other packages that do this to understand how to fix the issue, but I'll keep you posted! I opened the issue because I think it's good to have a reference!

[fabiocaccamo]

@stef-iula my question doesn't require that you read the code, because the problem is that from the "Codice Fiscale" it is possible to obtain only the last 2 digits of the year, so it is impossible to distinguish if 21 means 1921 or 2021.
For this reason I decided to give priority to the more recent year in these cases.

[stef-iula]

I am aware of how it works and the fact that this basically has to be modulo 100 yrs but I tried one of these corner cases on this website https://www.codicefiscale.com/inverso.php and it worked properly so I was wondering if there's a way solving it.

[fabiocaccamo]

Using https://www.codicefiscale.com/inverso.php try to generate your own CF twice, the first time with birthdate year 1921 and the second time with year 2021, you will obtain the same code... Probably they do just the opposite (they do precedence to the older year), but the problem is the same.

[stef-iula]

I tried decoding several times the CF that gave me problems (I can't share for privacy reasons) and I always got the right result -- 1921 as birth year.

[fabiocaccamo]

Sure, but if you would decode the code of a child born in 2021, you will obtain 1921 anyway, there is not solution.

[stef-iula]

I see.. well, hopefully it's about corner cases so I'd better find a way to handle them in my app. Thanks a lot for the discussion, closing this since there appears to be no solution :)
Cheers!

[fabiocaccamo]

Yes, it is really a corner case.