I think this is a very though subject and cannot be treated so easily.
Visa policies might be very different from one country to another, updated quiet often etc.
What you believe to be the source of truth on the internet might not be the actual truth. For personal reasons I recently had to know whether or not a Visa was required for a personal short travel to Russia for a Mauritius citizen. Various information can be found on the internet, some says yes, some says no. Your website says a visa is required. However, a visa is not required in this case.
It's very tricky to get the correct information, always up to date, and your website can lead to people having issues entering a country.
> If what you really need is a text field with an length limit then varchar(n) is great, but if you pick an arbitrary length and choose varchar(20) for a surname field you're risking production errors in the future when Hubert Blaine Wolfeschlegelsteinhausenbergerdorff signs up for your service.
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Visa policies might be very different from one country to another, updated quiet often etc.
What you believe to be the source of truth on the internet might not be the actual truth. For personal reasons I recently had to know whether or not a Visa was required for a personal short travel to Russia for a Mauritius citizen. Various information can be found on the internet, some says yes, some says no. Your website says a visa is required. However, a visa is not required in this case.
It's very tricky to get the correct information, always up to date, and your website can lead to people having issues entering a country.