Section
Description
Obligatory
Identification code
Yes
alphanumeric 50
Name of the employer
Yes
alphanumeric 100
Number of authorization
Length
No
alphanumeric 50
Yes
alphanumeric 4
City of registered office
Address of registered office
Postal code of the registered office
Yes
Yes
Yes
alphanumeric 100
alphanumeric 100
alphanumeric 15
Telephone number of registered office
Fax number of registered office
Email
Does not have a tax code
Section 1.1 –
Person
Representing
the Service
Provider
Yes
No
Yes
Yes
alphanumeric
alphanumeric
alphanumeric
alphanumeric
State
Section 1Service
Provider
Type
Identification code
20
20
50
2
Encoding type
Unique identification code assigned to the
service provider by the State of establishment
Name of the employer.
Company name or Name and Surname for
private persons and professionals
Number of the authorization to operate as a
temporary employment undertaking or
placement agency issued by the State of
establishment, where such authorization is
required by the law of that State and limited
to TWA
State of establishment of Service Provider
Source: Table ‘Municipalities and foreign
countries’
City of the service provider’s registered office
The service provider’s registered office address
Postal code of the service provider’s registered
office
Contact details of the service provider’s
registered office
If Yes: the Person representing the service
provider does not have an Italian tax code
If No: the person representing the service
provider has an Italian tax code
Yes
alphanumeric 50
If the person representing the service provider
is an Italian citizen, ‘Yes’ must be selected
If the answer to ‘Does not have a tax code’ is
‘No’: then it corresponds to an Italian tax code.
Both 16 and 11 digit alphanumeric codes are
1
acceptable.
Surname
Yes
alphanumeric 50
Name
Yes
alphanumeric 50
Gender
Yes
alphanumeric 1
Date of birth
Yes
yyyy-mm-dd
Citizenship
Yes
alphanumeric 3
Country of birth
Yes
alphanumeric 4
Town of birth
Resident in Italy
10
Yes
if alphanumeric 100
‘Country of
birth’
is
not Italy
Yes
alphanumeric 2
If the answer to ‘Does not have a tax code’ is
‘Yes’: then it corresponds to the unique
Identification code given to the person
representing the service provider, by his/her
State of origin, for tax or similar purposes.
Surname of the person representing the service
provider
Name of the person representing the service
provider
Gender of the person representing the service
provider.
Possible options: M or F
Date of birth of the person representing the
service provider.
Citizenship of the person representing the
service provider.
Source: Table ‘Citizenships’
Country of birth of the person representing the
service provider.
Source: Table ‘Municipalities and foreign
countries’
Foreign town of birth of the person representing
the service provider
If country of birth is Italy, no entry is necessary.
If citizenship is not Italian: the foreign person
representing the service provider does not
regularly reside in Italy
If citizenship is Italian: the foreign person
representing the service provider regularly
resides in Italy
2
If citizenship is Italian: ‘Yes’ must be selected.
Town in Italy
Section 2 Liaison
Officer/
Contact
Person
of
Service
Provider
Yes
alphanumeric 4
Address in Italy
Yes
alphanumeric 100
Postal code in Italy
Yes
alphanumeric 5
Section 2.1 – Identification code
Liaison Officer
Article
10,
paragraph 3,
letter b)
Yes
alphanumeric 50
Does not have a tax code
Yes
alphanumeric 2
Residency in Italy must be indicated when a
citizen from a non-EU State stays for longer than
a three-month period.
Italian municipality in which the person
representing the service provider regularly
resides.
Source: Table ‘Municipalities and foreign
countries’
Address in Italy where the person representing
the service provider regularly resides.
Postal code where the person representing the
service provider regularly resides.
If the answer to ‘Does not have a tax code’ is
‘No’: then it corresponds to an Italian tax code.
Both 16 and 11 digit alphanumeric codes are
acceptable.
If the answer to ‘Does not have a tax code’ is
‘Yes’: then it corresponds to the unique
Identification code given to the liaison officer
Article 10, paragraph 3, letter b) by his/her State
of origin, for tax or similar purposes
If the answer is ‘Yes’: the liaison officer Article
10, paragraph 3, letter b) does not have an
Italian tax code.
If the answer is ‘No’: the liaison officer Article
10, paragraph 3, letter b) has an Italian tax code.
If the liaison officer Article 10, paragraph 3,
letter b) is an Italian citizen, ‘Yes’ must be
3
Surname
Yes
alphanumeric 50
Name
Yes
alphanumeric 50
Gender
Yes
alphanumeric 1
Date of birth
Yes
yyyy-mm-dd
Country of birth
Yes
alphanumeric 4
Town of birth
Municipality of birth
Citizenship
10
Yes
if alphanumeric 100
‘Country of
birth’
is
not Italy
Yes
if alphanumeric 4
‘Country of
birth’
is
Italy
Yes
alphanumeric 3
Town of chosen address
Yes
alphanumeric 4
Chosen address
Yes
alphanumeric 100
selected
Surname of the liaison officer Article 10,
paragraph 3, letter b)
Name of the liaison officer Article 10, paragraph
3, letter b)
Gender of the liaison officer Article 10,
paragraph 3, letter b)
Possible options: M or F
Date of birth of the liaison officer Article 10,
paragraph 3, letter b).
Country of birth of the liaison officer Article 10,
paragraph 3, letter b).
Source: Table ‘Municipalities and foreign
countries’
Foreign town of birth of the liaison officer Article
10, paragraph 3, letter b).
If country of birth is Italy, no entry necessary.
Municipality of birth of the liaison officer Article
10, paragraph 3, letter b).
If Country of birth is not Italy, no entry is
necessary.
Source: Table ‘Municipalities and foreign
countries’
Citizenship of the liaison officer Article 10,
paragraph 3, letter b).
Source: Table ‘Citizenships’
Town of chosen address of the liaison officer
Article 10, paragraph 3, letter b).
Chosen address of the liaison officer Article 10,
4
Postal code
Telephone number
Mobile number
Fax number
Email
Section 2.2 – Identification code
Contact
person
Article
10,
paragraph 4
Does not have a tax code
Yes
alphanumeric 5
Yes
Yes
No
Yes
Yes
alphanumeric
alphanumeric
alphanumeric
alphanumeric
alphanumeric
Yes
20
20
20
50
50
alphanumeric 2
paragraph 3, letter b).
Postal code of the liaison officer Article 10,
paragraph 3, letter b).
Contact details of the liaison officer Article 10,
paragraph 3, letter b).
If the answer to ‘Does not have a tax code’ is
‘No’: then it corresponds to an Italian tax code.
Both 16 and 11 digit alphanumeric codes are
acceptable.
If the answer to ‘Does not have a tax code’ is
‘Yes’: it corresponds to the unique Identification
code given to the contact person Article 10,
paragraph 4 by their State of origin, for tax or
similar purposes
If the answer is ‘Yes’: the contact person Article
10, paragraph 4 does not have an Italian tax
code.
If the answer is ‘No’: the contact person Article
10, paragraph 4 has an Italian tax code.
Surname
Yes
alphanumeric 50
Name
Yes
alphanumeric 50
Gender
Yes
alphanumeric 1
If the contact person Article 10, paragraph
an Italian citizen, ‘Yes’ must be selected
Surname of the contact person Article
paragraph 4
Name of the contact person Article
paragraph 4
Gender of the contact person Article
paragraph 4
4 is
10,
10,
10,
Possible options: M or F
5
Date of birth
Yes
yyyy-mm-dd
Country of birth
Yes
alphanumeric 4
Town of birth
Municipality of birth
Tax code
10
Yes
if alphanumeric 100
‘Country of
birth’
is
not Italy
Yes
if alphanumeric 4
‘Country of
birth’
is
Italy
Citizenship
Yes
alphanumeric 3
Town of chosen address
Yes
alphanumeric 4
Chosen address
Yes
alphanumeric 100
Postal code
Yes
alphanumeric 5
Telephone number
Mobile number
Fax number
Email
Yes
Yes
No
Yes
Yes
alphanumeric
alphanumeric
alphanumeric
alphanumeric
alphanumeric
20
20
20
50
11
Date of birth of the contact person Article 10,
paragraph 4.
Country of birth of the contact person Article 10,
paragraph 4.
Source: Table ‘Municipalities and foreign
countries’
Foreign town of birth of the contact person
Article 10, paragraph 4.
If country of birth is Italy, no entry is necessary.
Municipality of birth of the contact person
Article 10, paragraph 4.
If Country of birth is not Italy, no is entry
necessary.
Source: Table ‘Municipalities and foreign
countries’
Citizenship of the contact person Article 10,
paragraph 4.
Source: Table ‘Citizenships’
Town of chosen address of contact person
Article 10, paragraph 4.
Chosen address of contact person Article 10,
paragraph 4.
Postal code of contact person Article 10,
paragraph 4.
Contact details of the contact person Article 10,
paragraph 4.
Tax code of the Receiving company.
6
Section 3 –
Receiving
company
Name of the employer
Yes
alphanumeric 100
Sector
Yes
alphanumeric 8
The 11 digit tax code must be entered.
Self-employed persons and Professionals must
enter their personal 16 digit alphanumeric tax
code.
Name of the employer.
Company name or Name and Surname for
private persons and professionals
Industrial sector, according to the ‘ATECO 2007’
(NACE) industrial activity classification.
Only second level definitions are allowed.
Yes
alphanumeric 4
Source: Table ‘ATECO 2007’.
City of registered office for companies and
professional firms
City of registered office
Yes
alphanumeric 100
Municipality of residence for individuals and
professionals.
Address of registered office for companies and
professional firms.
Address of registered office
Postal code
Section 3.1 – Tax code
Person
Representing
the Receiving
Company
Yes
Yes
alphanumeric 5
alphanumeric 50
Address of residence for individuals and
professionals.
Postal code of registered office for companies
and professional firms.
Postal code of residence for individuals and
professionals.
If the answer to ‘Does not have a tax code’ is
‘No’: it corresponds to an Italian tax code. Both
16 and 11 digit alphanumeric codes are
acceptable.
If the answer to ‘Does not have a tax code’ is
‘Yes’: it corresponds to the unique Identification
7
Does not have a tax code
Yes
alphanumeric 2
code given to the person representing the
receiving company by their State of origin, for
tax or similar purposes
If the answer is ‘Yes’: the person representing
the receiving company does not have an Italian
tax code.
If the answer is ‘No’: the person representing
the receiving company has an Italian tax code.
Surname
Yes
alphanumeric 50
Name
Yes
alphanumeric 50
Gender
Yes
alphanumeric 1
Date of birth
Yes
yyyy-mm-dd
Citizenship
Yes
alphanumeric 3
Country of birth
Town of birth
Yes
10
alphanumeric 4
Yes
if alphanumeric 100
‘Country of
birth’
is
If the person representing the receiving
company is an Italian citizen, ‘Yes’ must be
selected.
Surname of the person representing the
receiving company.
Name of the person representing the receiving
company.
Gender of the person representing the receiving
company.
Possible options: M or F
Date of birth of the person representing the
receiving company.
Citizenship of the person representing the
receiving company
Source: Table ‘Citizenships’
Country of birth of the person representing the
receiving company
Source: Table ‘Municipalities and foreign
countries’
Foreign town of birth of the person representing
the receiving company
8
Municipality of birth
Section 4 - Section 4.1 - Section
Postings
Posting
4.1.1
Duration
Section
4.1.2
Location
Section
4.1.3
Workers
not Italy
Yes
if alphanumeric 4
‘Country of
birth’
is
Italy
Start date of Yes
posting
End date of Yes
posting
yyyy-mm-dd
10
yyyy-mm-dd
10
Municipality
Address
Postal code
Number in
running
order
Identification
code
Yes
Yes
Yes
Yes
alphanumeric
alphanumeric
alphanumeric
numeric
4
100
5
3
Yes
alphanumeric 50
Does not have a tax code
Yes
alphanumeric 2
Municipality of birth of the person representing
the receiving company
If Country of birth is not Italy, no entry is
necessary.
Source: Table ‘Municipalities and foreign
countries’
Beginning date of worker’s/s’ posting period
End date of worker’s/s’ posting period
Beginning date of posting period must be before
or the same as the end date of the posting
Municipality of the posting location
Address of the posting location
Postal code of the posting location
Unique number in running order of the worker
for the entire declaration.
If the answer to ‘Does not have a tax code’ is
‘No’: it corresponds to an Italian tax code. Both
16 and 11 digit alphanumeric codes are
acceptable.
If the answer to ‘Does not have a tax code’ is
‘Yes’: it corresponds to the unique Identification
code given to the worker by his/her State of
origin, for tax or similar purposes
If the answer is ‘Yes’: the worker does not have
an Italian tax code.
If the answer is ‘No’: the worker has an Italian
tax code.
9
Surname
Name
Gender
Yes
Yes
Yes
alphanumeric 50
alphanumeric 50
alphanumeric 1
Date of birth
Country of birth
Yes
Yes
yyyy-mm-dd 10
alphanumeric 4
Town of birth
Municipality of birth
Citizenship
Job
Transmission date (Timestamp)
Section 5
Transmission
Data
Identification code
E-mail of the person
declaration
Kind of declaration
making
Yes
if alphanumeric 100
‘Country of
birth’
is
not Italy
Yes
if alphanumeric 4
‘Country of
birth’
is
Italy
Yes
No
Yes
alphanumeric 3
alphanumeric 50
yyyy-mm-dd 10
Yes
alphanumeric 50
the Yes
alphanumeric 50
Yes
alphanumeric 1
If the worker is an Italian citizen, ‘Yes’ must be
selected
Surname of the worker.
Name of the worker.
Gender of the worker.
Possible options: M or F
Date of birth of the worker.
Country of birth of the worker.
Source: Table ‘Municipalities and
countries’
Foreign town of birth of the worker.
foreign
Municipality of birth of the worker.
If country of birth is not Italy, no entry is
necessary.
Source: Table ‘Municipalities and foreign
countries’
Citizenship of worker.
Job or level of worker.
Transmission date of declaration.
Automatically set up by the system
Identification code/ tax code of the person
completing the form.
Automatically set up by the system
E-mail of the person completing the form.
Automatically set up by the system
Kind of declaration:
 C: Advance Declaration
 P: Postponed Advance Declaration
10
Identification code of the Declaration
Previous identification code
Yes
No
numeric
alphanumeric
17
 A: Annulment
 V: Variation
Unique identification code of the Declaration.
Automatically set up by the system
Unique identification code of the Declaration to
be annulled or changed.
The minimum and maximum quantities permitted for each section and type of declaration are illustrated in the Table below
Type of Declaration
All sections with the exception of 4.1 and 4.1.3
Sections 4.1 and 4.1.3
Minimum
Maximum
Minimum
Advance Declaration
Postponed Advance Declaration
1
1
1
Annulment
Variation
1
1
1
Maximum
No limit
1
11