Address requirements bpost (Belgium)

Letters sent to Belgium, once printed, are forwarded to bpost for delivery. From this point onwards, further responsibility lies with bpost. To ensure that your letters can be processed smoothly and for the agreed prices by bpost, it is important that the recipient addresses comply with specific requirements.

In this article, we have summarised the most important address requirements of bpost for you.

In order to provide our customers with the best possible support in complying with these requirements, Pingen checks the recipient address for additional requirements for letters to Belgium since April 1st 2025. Learn more about the address checks of Pingen

If there are problems processing the recipient's address, bpost may reject the letter or only deliver it for a surcharge. In such cases, no reimbursement will be made correct addressing is the sender’s responsibility and the costs cover the additional processing effort. To ensure that the address meets the postal address requirements, we recommend sending a test letter via Pingen and verifying successful delivery. In this way, potential problems can be recognised and rectified at an early stage to ensure smooth delivery.

Address requirements bpost:

Address structure

To ensure that the recipient's address can be processed by bpost, the following order must be respected:

• Salutation (optional), recipient name
• Further recipient designations (optional)
• Company name (optional)
• Street and house number with box number (optional) or PO box and PO box number in one line in this order. Additional information such as building, entrance, floor and other details must be provided on the address line above.
• 4-digit postcode and city in one line in this order, without a comma separation between postcode and city. Additional information about the destination country (country code or ISO code) must be omitted.

The following link allows you to check addresses directly by bpost and output them in the correct format: www.bpost.be/en/addressing-address-validation-tool

Usually accepted by bpost:

Usually not accepted by bpost:

Fonts

bpost defines specific information regarding font formatting:

Font size (height of verse)

• ‍Minimum: 10 pt
• Maximum: 17 pt
• Recommended font size: 10 pt to 12 pt in "regular" (normal) font style

Character spacing

‍End of a character to the beginning of the next character:

• Minimum: 0.35 mm
• Maximum: 2.0 mm

Word spacing

‍The space between blocks of digits and words:

• Maximum: 2.0 mm
• Usually one space

Font & colour

‍For the recipient's address to be properly read, a clear font with an easily readable font size is mandatory.

• Recommended fonts: Arial, Helvetica or Verdana
• Uniform font
• Font colour: Black
• No italics or decorative fonts
• No serif fonts
• No negative or bold fonts
• No fonts with connected letters
• No 3D or shaded fonts

Usually not accepted by bpost:

Further details on the design:

bpost specifies further requirements for address design:

• At least three, maximum seven address lines
• The address must be left-aligned
• Address must be consistently in the same language
• No special characters such as inverted commas, brackets, exclamation and question marks or ‘/’, ‘#’, ‘&’, ‘§’, ‘n°’, ‘nr’, etc.)
• No lines, underlining or framing in the address
• No blank lines between the address lines
• Neither postcode nor city must be underlined or blocked out.
• Use of Latin characters and Arabic numerals only.

Usually not accepted by bpost:

Detailed documentation of the requirements by bpost can be found here:

Address verification by Pingen (since April 1st 2025)

To help you meet the requirements of bpost, Pingen will check the recipient address for compliance with additional requirements from April 1st 2025 for letters to Belgium.

If Pingen detects that a document does not comply with the address requirements, it will receive the status "Action required" after upload. The "cover page feature" enables you to correct the recipient's address directly via Pingen. This feature automatically adds a new page in front of the document. This allows the address to be re-entered in compliance with the address requirements and placed on the cover page accordingly.

The following requirements will be reviewed in Pingen from April 1st 2025:

Prohibited content in the postcode line

In the address line with the postcode and the city, the postcode must appear before the city. In addition, there must be no characters (such as a comma or hyphen) between the postcode and the city. Both pieces of information must be separated by a space. Pingen checks whether the order is correct and whether there is a space after the postcode.

In addition, country designations before the postcode such as BE- or B- should be avoided, as these are no longer accepted by bpost.

Please ensure that the line with the postcode only contains the postcode and the city and that they are separated by a space. For example, 9050 Gent (and not “9050, Gent” or “BE-9050 Gent” or “B-9050 Gent” or “Gent 9050”).

Insufficient address lines

bpost requires that an address consist of at least three lines. For this reason, Pingen checks whether the address contains enough lines.

Please make sure the different parts of the address are correctly separated and that the address consists of at least 3 address lines.

Postcode does not have 4 digits 

In Belgium, postcodes that are not 4-digit are considered invalid. If a recipient address has a postcode with fewer or more than 4 digits respectively no valid country designation, it will be rejected by Pingen. Pingen checks whether the last or second-last address line contains a 4-digit postcode. 

Please ensure that the postcode is a continuous 4-digit number respectively for letters abroad that a supported country name is stated on the last address line. For example, 9050 Gent (and not "905 Gent" or "9 050 Gent" or "9'050 Gent" or “FR” or any other information).

Unsupported ISO country code

The spelling BE-9050 Gent (i.e. ISO2 country code before the postcode) had not been supported by bpost for several years. For this reason, Pingen checks whether there is an ISO2 country code (such as “BE-“) on the line with the postcode.

Please ensure that the country name is stated on the last address line and that the address line with the postcode does not have a country designation. For example, 9050 Gent (and not “BE-9050 Gent”).

City/town missing after postcode

bpost requires that the city or town name appears immediately after the postal code. For this reason, Pingen checks whether the address line with the postal code also includes a city/town name (such as "Gent," "Brussels," etc.).

Please ensure that on the address line with the postal code also a city or town name is present. For example, 9050 Gent (and not “9050“).

Country designation on the postcode line

bpost requires that the country name is the only content on the final address line. For this reason, Pingen checks whether there is a country designation (such as "Belgium," "België," "Belgique," or "Switzerland") on the line with the postal code.

Please ensure that the country name is on the last address line and that the address line with the postcode does not have a country name. For example, 9050 Gent (and not “9050 Gent Belgium“ or “9050 Gent, België” or “9050 Gent (Belgium)”).

Country designation on the last address line

bpost specifies that for local letters to Belgium, the country should not be stated in the address. Pingen checks, whether Belgium is stated as the destination country for local letters.

For Organisations with the default recipient country Belgium, please ensure that there is no country name (such as Belgium, België or Belgien) on the last address line.

Invalid address structure

When sending letters to Belgium, no empty lines (or lines without content) are allowed between the different address lines. Furthermore no address line may exist between the address line with the postcode/city and the address line with the country name. Pingen checks, wether any unsupported address line follows after the address line with the postcode/city.

Please ensure the address does not contain any empty lines, the address line with the postcode/city is only followed by the (optional) country name and the order of the address lines is correct. For example no information is between the (optional) country name and the address line with the postcode/city.

Distracting elements in the address area

bpost specifies that only the postal address may be included in the address area. Pingen checks whether there is any additional information in the address area below the address.

Please ensure that no further details follow below the postal address and that there is no additional content in the address area.

Important:

For technical reasons, Pingen cannot carry out a complete verification of the requirements by bpost. The address check by Pingen serves solely to help identify various problems before sending the letter. However, it is the sender's responsibility to ensure that letters sent to Belgium via Pingen comply with bpost regulations. Any additional expenses due to incorrect addressing will be charged by Pingen.

Note: The illustrations in this article are not to scale.