which ID's are required?

[Saffy]

my husband is tunisian and he is a living in italy and a resident of italy

now when we apply and have to show his ID documents, do they want to see his ID for italy or his ID for tunisia or both? which one do they expect us to show them?

(he also has tunisian passport that he can show them) but the ID cards are different, so which one is necessary to show?

[Huron]

my husband is tunisian and he is a living in italy and a resident of italy

now when we apply and have to show his ID documents, do they want to see his ID for italy or his ID for tunisia or both? which one do they expect us to show them?

(he also has tunisian passport that he can show them) but the ID cards are different, so which one is necessary to show?

If you look at the applicable region guide it  has a check list of all the documents that you will need to include with your application. 

[Saffy]

but it is not clear about which national ID they want to see, the one of his native country or the ID of the country he is residing in?

[sidkrose]

Just do both, to be safe.

[Huron]

but it is not clear about which national ID they want to see, the one of his native country or the ID of the country he is residing in?

Actually the guide is clear and it states that both are required:

Item 9 from the check list.....

•Passports or travel documents for you, your spouse or common-law partner and dependent children. Include only copies of pages showing the passport number, date of issue and expiration, your photo, name, family name (surname), date and place of birth.
•If you live in a country different from your nationality, include a copy of your visa for the country in which you currently live.

So both the Tunisian passport and the residency card for Italy are required.