Finding a collection notice in your mailbox can cause some apprehension. The absence of the sender’s name and the presence of a numeric barcode leave room for doubt and questions. However, deciphering this code is the first step to understanding the nature of the waiting communication. Specifically, registered mail code 15 and its variations (151, 152, 1513, 1514, 1515) belong to a category of communications that, in most cases, should not cause excessive concern.
Unlike other codes that signal legal documents or tax bills, code 15 is generally associated with standard registered mail. This tool, while having a higher legal value than ordinary mail, is used for communications that do not have the urgency or severity of a tax notification. Understanding its meaning allows you to approach the collection with greater peace of mind, turning an unknown into a conscious and informed action, a small but significant example of how knowledge simplifies daily life.
The Meaning of Registered Mail Code 15
When the initial digits 15 appear on the collection notice, it is very likely a routine communication. These codes are considered “harmless” because they usually do not carry alarming news like fines, legal documents, or requests from the Revenue Agency. In most cases, it is a standard registered mail, a tool used by individuals, companies, and professionals to send important communications that require proof of shipment.
The content of an envelope with code 15 is therefore varied but generally manageable. It could be a payment reminder for an upcoming bill, communications from your bank or insurance company, a letter from a condominium administrator, or even a communication from your employer. Although it is always advisable to collect the letter to know its exact content, identifying this code allows you to rule out, with a good degree of certainty, the most feared communications.
How to Identify the Sender of a Registered Mail with Code 15
Identifying the sender with absolute certainty before collecting the registered mail is complex due to privacy issues. However, some clues can significantly narrow down the possibilities. The first and most important is the numeric code on the collection notice. As we have seen, codes beginning with 15, but also with 12, 13, and 14, indicate standard registered mail, often sent by private parties.
Analyzing Clues on the Collection Notice
Besides the code, the notice itself, which today looks like a white receipt, offers other information. One element not to be underestimated is the city of origin of the shipment, which can provide an important hint about the sender. Although the color of the notice is no longer a reliable indicator as it was in the past, when green was reserved for legal documents, the combination of available information helps to create a clearer picture.
Using Online Tools
An effective method to get more details is to use the “Track & Trace” service on the Poste Italiane website. By entering the full 12-digit code from the notice, you can view the shipment status and, in many cases, the post office of origin. This, combined with the city of origin, can help you guess whether the sender is a utility company (electricity, gas), a credit institution, or another entity with which you have a relationship.
What to Do After Receiving a Collection Notice
Once you find the collection notice in your mailbox, the recipient has 30 days to pick up the registered mail at the indicated post office. It is essential to keep the notice, as it must be presented at the counter along with a valid ID. If you cannot go in person, the notice itself has a space for authorization, allowing another person to make the collection.
Ignoring the notice and not collecting the letter is an ill-advised choice. After 30 days, the registered mail is returned to the sender with the note “compiuta giacenza” (collection period expired). By law, the communication is still considered delivered and takes effect, even if the recipient has not read its content. For example, an uncollected payment reminder does not stop the deadlines and can lead to more serious consequences. Dealing with the communication is always the best strategy.
Differences with Other Registered Mail Codes
Understanding code 15 becomes even easier when compared to other, more concerning codes. While 15 indicates ordinary communications, other numbers are specifically linked to notifications that require immediate attention. For example, codes beginning with the digits 75, 76, 77, 78, 79 are often associated with fines, legal documents, or important communications from the Revenue Agency. Similarly, codes 670, 671, and 689 are notorious for identifying payment notices from the Agenzia delle Entrate-Riscossione (formerly Equitalia).
Even codes starting with 6, like the registered mail code 665, often related to traffic accidents or communications from insurance companies and banks, or codes 608 and 609, used for public administration acts, have a different specific weight. Knowing these distinctions allows you to prioritize and reduce the anxiety associated with receiving registered mail. In this landscape, code 15 represents a breath of fresh air, a reminder that not all certified mail brings bad news.
In Brief (TL;DR)
Received a collection notice with registered mail code 15? This guide explains how to trace the sender, the meaning of this code, and what to do before and after collection.
In this guide, you’ll discover the most common senders associated with this code and receive clear instructions on how to proceed.
Finally, we will provide detailed instructions on what to do, from the moment you receive the collection notice to handling the communication inside the envelope.
Conclusion

In an increasingly digital world, paper-based registered mail maintains a central role for formal communications, combining tradition and legal value. Registered mail code 15 fits into this context as a messenger of predominantly ordinary communications, far from the worries generated by other tax or judicial codes. Knowing that this code usually identifies standard registered mail, sent by individuals, companies, or professionals for matters like invoice reminders or service notices, allows you to manage the wait for collection with greater peace of mind.
Analyzing the collection notice, combined with the use of online tracking tools, gives citizens the ability to act in an informed manner. Never collecting the communication is not a solution, as the notification by ‘compiuta giacenza’ (collection period expired) still produces its legal effects. Being a savvy user, capable of deciphering these small codes of daily bureaucracy, is not just a practical advantage, but a real skill for interacting effectively with institutions and companies, balancing documentary tradition with the opportunities of digital innovation.
Frequently Asked Questions

A registered letter with code 15, or other codes starting with the digits 15 (like 151, 152, 1513), generally identifies ‘standard registered mail’. This type of communication usually does not contain legal documents, fines, or tax bills. It is more likely to be a letter sent by an individual, a lawyer, a bank, an insurance company, or a utility provider (electricity, gas, water). The content could be a payment reminder, a formal notice, an upcoming bill, or other commercial and administrative communications.
The senders of a registered letter with code 15 are varied. They are generally private parties such as: a lawyer for a formal notice, an employer, a utility company for a payment reminder, a bank or credit institution for various communications, or an insurance company. Although less concerning than other codes, it is always important to collect it to know its exact content.
Generally, no. Codes starting with 15 are associated with standard registered mail and not with communications of a fiscal or judicial nature. Legal documents and fines are usually identified by other codes, such as those starting with 75, 76, 77, 78, 79 or 668. Similarly, payment notices from the Agenzia delle Entrate-Riscossione (formerly Equitalia) are often associated with codes like 670, 671, or 689.
If you find a collection notice, it is crucial not to ignore it. You have 30 days to pick up the registered letter at the post office indicated on the notice. If you do not collect it within this period, a ‘compiuta giacenza’ (collection period expired) occurs: the law considers the communication as having been duly received, with all the legal consequences that follow. Therefore, even if code 15 is considered ‘harmless,’ it is crucial to collect the letter to be aware of its content.
Yes, besides the numeric code, another clue can be the color of the collection notice, although this practice is less common today. Traditionally, a green notice indicated legal documents or fines, while a white one was used for all other communications. However, today the white receipt-like notice is predominantly used for all types of communication, making the numeric code the most reliable clue.




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