For a Catholic wedding the following documents are required. Your priest will prepare these for you:

1) Certificate of Baptism, First Communion and Confirmation stamped by the local Bishop’s office.

2) Declaration (formal letter) from your Priest/Pastoral Advisor which could state that both bride and the groom are active in the Catholic Church and that they intend seriously to have a religious blessing in Italy (specify the name of the church you selected in Italy and your wedding date). This letter represents a permission released by you Priest and required by the Italian Curia which testifies that your local Priest knows you and allows your wedding in Italy.
Being an official and formal letter this has to be written in a letterhead paper of your Parish.
The letter must also state that you have fulfilled all the PRE CANA CLASSES : the CERTIFICATE OF THE PREMARIATAL CLASSES (if a certificate was done) this should be included.

3) NIHIL OBSTAT: Letter from the Bishop of your Parish, stating the same as in # 2 (written on letterhead of your Bishop’s office). This is one of the most important documents required by the Italian religious Authorities. This letter must specify that you have NO IMPEDIMENT to get married in the Italian Church you have selected (specify the name) on the date requested. This letter certifies that the religious authorities over your local priest have approved your wedding in Italy.

4) Original PRENUPTIAL INQUIRY FORM, issued by the archdiocese of your city (the Italian Curia must have a proof that your wedding has been approved by the higher member of the Catholic Church in your country). This document has to be issued by your Parish (written on a formal letterhead). It has to be signed and stamped with the Church seals by your local Bishop’s office (not by your Priest). The Prenuptial Inquiry Form is a prenuptial investigation which includes: your personal details and some general religious data. This questionnaire has to be filled with you together with your Priest.

PERMISSION OF MIXED RELIGION OR DISPENSATION
If one of you are not Catholic you are allowed to get married but you should provide this additional document which testifes that your wedding can be performed by the Italian religious authorities. This certificate is usually issued by the local bishop of your country, but I would suggest to ask your local priest for information, he will easily help you to obtain this document. The "Permission of mixed religion" has to be sealed or stamped by the Bishop’s Parish office.

TRANSLATION OF YOUR DOCUMENTS
You do not need to translate your documents into Italian, as our Archdiocese will directly translate them.

DOCUMENTS EXPIRING DATES
Documents should not be done more than 6 months in advance or they expire.
Therefore you have plenty of time to obtain these documents as they cannot be received any earlier than six months before the wedding and usually by one month before.
Please note that at least a month is the minimum requested from the Italian religious Authorities to review and approve the paperwork.