Receiving a collection notice for registered mail can stir a mix of curiosity and apprehension. In our daily lives, steeped in instant digital communication, registered mail retains a role of officiality and importance. In Italy, this tool combines the tradition of paper communication with the need for legal, trackable notification. When the registered mail code 665 appears on the notice, you can get an idea of the contents even before going to the post office. This code is, in fact, associated with specific types of senders and communications, ranging from banking notices to payment reminders, and even news about insurance matters.
Understanding the meaning of registered mail codes is a small but useful example of how innovation is integrated into traditional practices. The numerical coding system is a logistical innovation that allows for the categorization and management of millions of shipments. For the citizen, it becomes a tool to decipher the nature of the communication in advance, reducing the anxiety of the unknown and allowing for proper preparation. This guide aims to explore the world of registered mail with code 665 in detail, offering a clear overview of senders, possible contents, and actions to take.
The Meaning of Registered Mail Code 665
Registered mail code 665 is an identification number that appears on the collection notice left by the mail carrier when it’s not possible to deliver the letter directly to the recipient. This code is part of a system, known as “Raccomandata Market,” used by Poste Italiane to manage communications sent by entities and companies. The first digits of the barcode are crucial for guessing the nature of the communication. Specifically, code 665 is often linked to notifications that are not related to legal documents.
Although there is no absolute certainty until the envelope is collected, experience and case studies gathered over time allow for a fairly accurate picture. Raccomandata Market 665 is frequently used for communications that, while having legal value, do not fall into the category of more worrying notices like fines or tax bills, for which other codes are usually used. Its function is to ensure certified delivery for important but predominantly commercial or administrative communications.
Who Are the Possible Senders of a 665 Registered Letter
Identifying the sender is the main concern for anyone who receives a collection notice. In the case of code 665, the most common senders belong to several categories. It is essential to remember that, although the code provides an indication, only collecting the registered letter can confirm with certainty who sent the communication.
Banks and Financial Institutions
One of the most frequent possibilities is that the 665 registered letter comes from your bank or another credit institution. Often, these communications concern the sending of new credit or debit cards, replacing expiring ones or upon the customer’s request. Other times, they may contain notices about your bank account, contractual changes, or other important information requiring official notification. Therefore, it’s not always bad news.
Insurance Companies
Another very common sender for code 665 is insurance companies. The communication could relate to the handling of a traffic accident claim, notices about your insurance policy, payment deadlines, or other administrative matters. In this context as well, the nature of the communication can vary, from a simple notification to a request for documentation.
Utility Companies and Debt Collection Agencies
Companies that provide services like electricity, gas, water, and telephone use Raccomandata Market to send payment reminders. If you receive a notice with code 665, it could therefore be a notice for an unpaid bill. Sometimes, if the debt persists, the case may be passed on to a debt collection agency, which in turn might use the same type of registered mail for its communications.
Other Possible Senders
Less frequently, code 665 can be associated with other types of senders. These include communications related to car tax (bollo auto) or recalls from car manufacturers. In some cases, the Italian Revenue Agency (Agenzia delle Entrate) might also use this code, but usually for positive communications such as the issuance of IRPEF tax refunds. Finally, INPS (the Italian National Social Security Institute) might also send notices with this code for matters related to refunds or debit notices.
What to Do After Receiving the Collection Notice
Once you find the collection notice in your mailbox, it’s important to act in an informed manner. The first thing to do is to carefully read all the information on the slip. In addition to the code, you will find the post office where the registered letter is being held and the hours for collection. It is essential to bring a valid ID and the notice itself to be able to collect the envelope.
The registered letter will be held for 30 days. During this period, the recipient can go to the post office to collect it. If the letter is not collected within this timeframe, the so-called “compiuta giacenza” (completed holding period) is perfected. The registered letter is then returned to the sender, and for legal purposes, the notification is still considered successfully delivered. Ignoring a registered letter is never a good strategy, as any legal or administrative consequences will proceed regardless.
If you are unable to go to the post office in person, you can authorize another person to collect it. You will need to fill out the appropriate authorization section on the collection notice and provide the authorized person with a photocopy of your ID, in addition to their original ID. For even easier management, some services like the one for tracking a 10-digit registered letter allow you to monitor the shipment’s status online.
In Brief (TL;DR)
If you’ve received a collection notice with registered mail code 665, this guide helps you understand its meaning, recognize the sender, and know how to act.
We will delve into the most common possible senders associated with this code, such as the Italian Revenue Agency-Collection or INPS, and provide you with a guide on how to proceed.
Finally, find out how to behave and what steps to follow, from managing the collection notice to the actual collection of the communication.
Conclusions

In a world that moves fast between emails and instant messaging, registered mail with return receipt retains a legal value and a solemnity that technology has not yet replaced. Registered mail code 665, while it may initially cause concern, often turns out to be related to routine administrative or commercial communications. Generally, the senders are banks, insurance companies, or utility providers. In most cases, it is not a matter of legal documents or tax bills, for which different codes are designated, such as registered mail code 673.
The key is to approach the receipt of a collection notice proactively. Checking the code is the first step to getting an idea of the content, but collecting the communication at the designated post office, such as the Rome 6 post office, remains an essential action. Ignoring the notification only postpones the problem, as the law considers the communication delivered after the holding period. Knowing the meaning of the codes is a way to navigate the obligations and communications of daily life with greater awareness, turning a moment of uncertainty into an informed and manageable action.
Frequently Asked Questions

Registered mail code 665 identifies a ‘Raccomandata Market,’ a service used by companies and entities for communications that require proof of sending and receipt. Unlike other codes, 665 is versatile, but it is generally associated with banking or insurance communications, payment reminders, or, in some cases, tax refunds. It does not, therefore, definitively indicate the sender, but it does narrow down the possibilities.
The most frequent senders for code 665 are banking institutions (for sending new credit/debit cards), insurance companies (for matters related to claims), utility companies (for bill payment reminders), and sometimes INPS or the Italian Revenue Agency for specific communications like refunds.
No, not necessarily. Although it could be a payment reminder, this code is also widely used for neutral or positive communications. For example, a bank might use it to send a new credit card to replace an expired one, or the Italian Revenue Agency might notify you of an IRPEF tax refund.
It is very unlikely. Fines and legal documents are generally identified by other codes, such as those beginning with 78 (e.g., 786, 787, 788) or codes 613, 615, and 668. Code 665 is almost always linked to commercial or administrative communications, not judicial ones.
You must go to the post office indicated on the notice with a valid ID and the notice itself to collect the letter. It is advisable to do so within the 30-day holding period to prevent the communication from being legally considered delivered due to ‘compiuta giacenza’ (completed holding period) and returned to the sender, with all the legal consequences that may entail.




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