Flamenco show reservations in Granada--asking for passport number?

What do you mean by "safe"? Do you think it could damage your passport if you give someone the number?
If you are booking online, they probably want to do an ID check when you pick up the tickets.
In order to prove ID it is normal to request ID card number (for locals) or passport number for foreigners.

I can understand a credit card number, but I am not sure why a passport number is required.

Without knowing any more details it's difficult to answer the question. However, it does appear odd to request a passport number as I fail to see the relevance for a flamenco show reservation.

It is dinner and a show. Passport # is required.
* Nombre
* Apellidos
* DNI/Nº de Pasaporte
* Teléfono 1
+34
Teléfono 2
+34
* Email
* Repita el email
* Idioma

• Campos obligatorios

Hola from Wisconsin,
Of course they want a passport number. It is Spain. If you don't want to supply that number willy nilly, then go to France. Just kidding. But, yes, we were asked several times on line when we booked tickets.

It might be a long term hangover of Franco. When you read of the police and informers during the Franco period you get the idea that some funky rules might still be in force and maybe the tradition of showing ID papers as locals traveled from town to town might make asking for a passport number seem natural. History casts a long shadow.

wayne iNWI

Which site are you using?
I reserved Flamenco shows online when I was there recently.
I agree giving your passport# is meaningless though compared to a credit card #.

But what is the reservation about giving out a passport number? Make a fake passport with the number? You can do a lot more with a credit card number than a passport number. It is nearly meaningless. Or is it just general paranoia ???

Italy also requires passport number for many things, especially to buy soccer (calcio) tickets.

It's waaay more risky to give your credit card number than you're passport number! What are they supposed to do? What is it that worries you? Anyway, in other countries, your passport is your ID, the only way to identify you, so it's likely you will be asked for it multiple times.

Yes, it not your social security number.

It's an ID number. It's fine.

Asking for your ID number is so ubiquitous in commercial Spain, that I suspect some places just include it on the form without thinking. On the other hand, many businesses do need to record for tax (or avoidance prevention) purposes your citizen number (the DNI on your list), or foreigner's resident tax number (the one I've got), or passport number if you're only a visiting alien as in your case. So asking for ID may well be a perfectly legitimate request, and one most wouldn't think twice about providing

I wouldn't worry about it anyway,it's just a normal part of life here.

Passport numbers are of no value to scammers or thieves. So there is no reason to worry about giving it out to various entities, like hotels and reservation systems.

It is not unreasonable for people to worry about this sort of thing, as there is of course serious concern about the wrong people getting a hold of Social Security numbers.

... in most countries in Europe one's ID is proved by the National ID each citizen has or, in its absence, the EU driving permit (if in a matter within the EU from citizens from another EU country) or, lastly, the passport.

While it could be used for such, it's not customary to use ccards as a means of ID like, for example, in the US. It's more a "cultural" thing than anything else: we have always had national IDs so "that" is what you use to ID yourself hence the reason you'll see that being so in many instances of daily life (ie. in supermarkets when using a ccard, albeit these days, with P&C card that's no longer the case).

But, of course, one has visitors from countries with no tradition of National IDs, therefore, one needs to adapt... then the passport it is.

Why? because passports are issued by "national governments", hence they are more trustful than ccards which, after all, are issued by private companies which might or might not be that reliable. Think small community banks in some countries, for example.

Btw, presenting a National ID or passport are the only valid means to identify yourself when checking in a hotel in many countries in Europe, certainly the big countries. When you check in a hotel, your information is immediately passed to the Police as well as when you check out. That goes back to the 60s and 70s and it's compulsory.

Yup, there's nothing strange to provide your passport number while in Europe. Don't be afraid as its only used for identifying your personality.