Finding a delivery notice in your mailbox always generates some anxiety, especially when the sender is not explicitly stated. If the slip left by the Poste Italiane mail carrier reports a numerical sequence starting with certain numbers, it is essential to know how to proceed. This definitive guide analyzes in detail the nature of these communications, providing a clear mapping updated to 2026 to help you handle the situation with awareness and without stress.
What is the delivery notice and registered mail code 675
The registered mail code 675 identifies an institutional communication sent via Poste Italiane, usually by local bodies such as Municipalities or Regions. When you find this specific number on the delivery notice, it almost always involves administrative acts, local taxes, or traffic fines to be managed.
The delivery notice, commonly known as the “white slip”, is the document the mail carrier leaves when they find no one at home at the time of delivery. The barcode printed on this slip is the key to understanding the origin of the shipment. The first three or four numbers (the identification codes) categorize the type of sender. According to official Poste Italiane documentation, the number series are not random but correspond to precise commercial and institutional agreements.
Main senders for the 675, 6756, and 67550 series

The series that includes the registered mail code 675, along with the variants 6756 and 67550, is used primarily by the local Public Administration. The most common senders are Municipal tax offices, Municipal Police commands, and regional offices.
To provide a clear picture and facilitate rapid identification, we have structured a mapping based on sector data and the most frequent user reports. Here is a summary table of the most probable matches:
| Initial Code | Typical Sender | Examples of Frequent Content |
|---|---|---|
| 675 | Municipalities, Regions, Local Health Authorities (ASL) | Institutional communications, election notices, generic recalculations |
| 6756 | Local Police, Tax Office | Traffic fines (ZTL, parking bans), IMU/TARI assessments |
| 67550 | Local collection agencies | Payment reminders, municipal tax injunctions, debt collection |
Communications from Municipalities and Local Police
Receiving a registered mail code 675 from a Municipality or Local Police often indicates the notification of a violation of the Highway Code or a tax assessment. It is essential to verify the exact sender via the online tracking service.
When the sender is the municipal administration, the registered letter usually has a direct impact on your personal finances. Local Police frequently use these codes to notify infractions detected via speed cameras or ZTL cameras, where deferred notification is the norm. Additionally, tax offices use them to send questionnaires or assessment notices for discrepancies in municipal tax payments from previous years.
Notices from Regions and Health Authorities
In addition to town halls, the registered mail code 675 is employed by Regions and Local Health Authorities (ASL) to send official communications. These may include car tax payments, summons for legal medical examinations, or updates on health procedures of vital importance to the citizen.
Regions, in particular, manage the collection of the vehicle tax (bollo auto). A delivery notice with this numbering could hide a reminder for an unpaid or late car tax. On the health front, ASLs send the results of specific medical commissions (e.g., civil disability) or communications regarding reimbursements and health copayments via registered mail.
Probable content of the registered letter

The content associated with registered mail code 675 generally concerns personal finance and citizen obligations. The envelopes often contain reminders for unpaid taxes, recalculations of local taxes, or communications regarding water services and waste management.
To be more specific, here is a bulleted list of the most common cases encountered in daily practice:
- IMU and TARI Assessments: Requests for integration for insufficient or omitted payments.
- Administrative Sanctions: Fines for violations of the Highway Code.
- Vehicle Tax: Amicable notices or tax bills for failure to pay the regional car tax.
- Single Property Fee: Notices regarding driveways, occupation of public land, or taxes on advertising signs.
- Urban Planning Communications: Responses to building files (CILA, SCIA) submitted to the Municipality.
How to track and pick up the communication
To discover the details of the registered mail code 675 in advance, you can use the “Search Shipments” service on the official Poste Italiane website. By entering the barcode from the delivery notice, you will view the competent post office and the status of the shipment.
The tracking process is simple and free. Here are the steps to follow:
- Connect to the Poste Italiane website or mobile app.
- Locate the search bar marked with the wording “Search Shipments” (Cerca Spedizioni).
- Type the entire numerical code found under the barcode of the delivery notice, without inserting spaces or dashes.
- Click on “Search” to view the shipment history and, in many cases, the city of origin (which will give you a strong clue about the sender).
For pickup, you can physically go to the post office indicated on the notice starting from the business day following the attempted delivery. Remember to bring a valid ID and the notice itself with you. Alternatively, it is possible to delegate a trusted person by filling out the appropriate section on the back of the slip.
Holding times and legal consequences
Ignoring a notice with registered mail code 675 is a serious strategic error. The holding period lasts 30 days, but for judicial or administrative acts, “deemed notification” (compiuta giacenza) applies after 10 days, making the notification legally valid for all intents and purposes.
Based on current regulations, pretending not to have received anything does not stop legal deadlines. On the contrary, deemed notification triggers the deadlines for any appeals or reduced payments. For example, if the registered letter contains a fine, the 5 days to pay with a 30% discount begin to run from the moment the notification is perfected. Once the total 30 days of holding at the post office have passed, the envelope is returned to the sender (Municipality or Region), but you will be considered fully informed of its content, suffering potential late payment penalties or enrollment in the tax roll.
In Brief (TL;DR)
The registered mail code 675 present on the white slip identifies institutional communications sent via Poste Italiane by local bodies such as Municipalities and Regions.
These letters generally contain important administrative acts, traffic fines from the Local Police, or tax assessments regarding taxes such as IMU, TARI, and car tax.
To manage the situation without any stress, you can proactively track the shipment on the Poste Italiane website using the barcode.
Conclusions

In summary, the registered mail code 675 and its variants require timely action by the recipient. Tracking the shipment and going to the post office allows you to manage any pending issues with Municipalities or Regions, avoiding financial penalties.
The golden rule in managing personal finance and bureaucratic obligations is proactivity. Use the digital tools made available by Poste Italiane to anticipate the content of the communication and show up at the post office prepared. Whether it is a simple informational notice or a tax to be regularized, facing the situation immediately is always the cheapest and safest choice.
Frequently Asked Questions

The sender of this specific postal communication is almost always an entity belonging to the local Public Administration. The most frequent institutional subjects are Municipalities, Municipal Police commands, Regions, and Local Health Authorities. Similar numerical variants usually indicate tax offices or local collection agencies tasked with recovering debts.
This type of envelope often contains administrative acts related to personal finance or citizen obligations. The most common cases include traffic fines for infractions detected by speed cameras, assessments on local taxes such as IMU and TARI, or reminders for failure to pay the regional vehicle tax. In the health sector, it may contain summons for medical examinations.
To discover the shipment details in advance, you must use the tracking service on the Poste Italiane web portal. By entering the complete barcode present on the «white slip» you will be able to view the delivery history and the city of origin. This will provide you with a very clear clue as to which entity is looking for you.
The envelope remains available for pickup for a total period of thirty days. However, for administrative acts, deemed notification occurs after only ten days. This means that the notification becomes legally valid for all intents and purposes even if you have not yet physically picked up the document.
Ignoring the communication is a serious strategic error because the legal deadlines for any appeals or discounted payments begin to run anyway after ten days. Once the total thirty days have passed, the letter returns to the sender, but you will be considered informed of the facts. This behavior inevitably leads to financial penalties and higher sanctions.
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Sources and Further Reading

- Poste Italiane – National Postal Service Overview (Wikipedia)
- Poste Italiane Official Shipment Tracking Service
- Taxation in Italy: Local and Municipal Taxes (IMU, TARI) (Wikipedia)
- Italian Revenue Agency (Agenzia delle Entrate) – Official English Portal
- Ministry of Economy and Finance (Italy) – Official Website





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