A package returned to the sender because the mail carrier couldn’t find the street, a delivery stuck at the sorting platform because the label doesn’t match any entry in the postal reference: these situations arise whenever the address line dedicated to the street deviates from writing conventions. The street label includes the number in the street, the type of street, and its name.
If poorly written, this line is enough to cause a delivery failure, even if the postal code and city are correct.
Abbreviations for street types: what automatic sorting really expects
The optical sorting machines of La Poste read the type of street first. When you write “Avenue” in full on a standard envelope, there’s no problem. However, as soon as you exceed the maximum length of the line (normally 38 characters according to the AFNOR NF Z 10-011 standard), you need to abbreviate.
A common mistake is to invent your own abbreviations. “Bld” for Boulevard, “Imp” for Impasse, “Av” without a period for Avenue: these forms do not correspond to standardized abbreviations. The direct consequence is that the automatic sorting does not recognize the type of street, and the mail goes into manual processing, which delays delivery.
You can consult the rules for street labeling to check the accepted abbreviated forms before sending in bulk.
- BD for Boulevard, AV for Avenue, RUE remains in full (three characters, nothing to gain by abbreviating).
- IMP for Impasse, ALL for Allée, PL for Place: these codes are from the HEXAVIA reference used by La Poste.
- Less common street types (Venelle, Sente, Chemin de Halage) often pose problems. When in doubt, it’s better to write the full word and shorten elsewhere in the line.
Limit of 38 characters per line: balancing readability and postal compliance
The AFNOR NF Z 10-011 standard sets each address line to a maximum of 38 characters, including spaces. On the street label line, you combine the number, any possible addition (BIS, TER), the type of street, and the name. It adds up quickly.
Let’s take a concrete case: “12 BIS BOULEVARD DU MARECHAL DE LATTRE DE TASSIGNY”. That counts 52 characters. You need to cut somewhere without losing the information necessary for delivery.
Where to cut first
You first abbreviate the type of street (BOULEVARD becomes BD). Then you shorten the honorific title (MARECHAL becomes MAL). The particles “DE” and “DU” remain as they are, as they are necessary for sorting. With these adjustments, “12 BIS BD MAL DE LATTRE DE TASSIGNY” drops to 37 characters.
Never truncate the proper name of the street. This is the part that the mail carrier uses on the ground. If “TASSIGNY” is cut to “TASSIG”, the address becomes ambiguous for manual delivery.
Street labeling and new municipal addressing: an unknown trap
Since the 3DS law, many French municipalities are conducting addressing and renumbering campaigns. Streets that have had a common name for decades are receiving a different official label. There are cases where the old street name, still used by residents, no longer appears in postal references.
Specifically, a shipment addressed to “Chemin de la Fontaine” may fail if the municipality has renamed this street “Rue des Sources” in its Local Address Base. La Poste considers old labels as unreliable for delivery, including on private roads open to traffic.
For a professional sender managing a customer database, this means that a standardized address from over a year ago may already be outdated. Returns vary on how often updates are necessary, but reprocessing every twelve to eighteen months seems reasonable to maintain a correct delivery rate.
Check the official label before sending
The National Address Base (BAN), accessible online, allows you to verify the exact label of a street as recorded by the municipality. You enter the street name and postal code. If the result differs from what you have in your database, it is the BAN label that serves as the reference for postal delivery.
Common writing errors on the street line
Some errors recur in the majority of address databases, whether entered manually or imported from a web form.
- Placing the name of the residence or building on the same line as the street. Residence and building go on a separate line, above the street line. Mixing the two prevents optical sorting from isolating the number and street name.
- Adding punctuation marks (commas, periods, dashes) between the number and the type of street. The postal standard uses neither commas nor periods on the street line. Only space separates the elements.
- Writing the postal code on the street line. The postal code and city constitute a separate line, always positioned below.
- Using accents and special characters. Postal address labels are written in uppercase without accents according to the AFNOR standard. “RUE DE LA PEPINIERE” and not “Rue de la Pépinière”.
The street label line concentrates the information that allows the mail carrier to physically identify the delivery location. Standardized abbreviations, adherence to the 38-character limit, and verification of the official name in the National Address Base: these three points are sufficient to cover the vast majority of non-delivery cases related to poorly written addresses.
