{"id":6163,"date":"2026-04-04T10:00:00","date_gmt":"2026-04-04T08:00:00","guid":{"rendered":"https:\/\/ekopro-grupa.pl\/?p=6163"},"modified":"2026-03-30T11:03:01","modified_gmt":"2026-03-30T09:03:01","slug":"bdo-numbers-where-to-find-them-who-assigns-them-and-when-they-have-to-be-displayed-on-documents","status":"publish","type":"post","link":"https:\/\/ekopro-grupa.pl\/en\/bdo-numbers-where-to-find-them-who-assigns-them-and-when-they-have-to-be-displayed-on-documents\/","title":{"rendered":"BDO numbers - where do you find them, who assigns them and when do you have to put them on documents?"},"content":{"rendered":"

BDO numbers<\/h1>\n\n\n\n
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The BDO registration number is one of those elements that businesses often treat as a mere formal number, until it becomes apparent that its absence can become a problem in audits, in the circulation of documents or in dealing with contractors. In practice, the BDO number is not just an identifier \u201einto the system\u201d, but a confirmation that an entity is on the register and operating within a certain scope of environmental obligations. The BDO indicates explicitly that the provincial marshal, when making an entry in the register, assigns an individual registration number to the entrepreneur and notifies him of this. It is this number that, in certain cases, must later be placed on documents related to the activities covered by the entry. It is therefore most important for a company not only to have a number, but also to know when and where to use it.<\/p>\n\n\n\n

Who broadcasts the BDO number and where to find it?<\/strong><\/h2>\n\n\n\n
\"\"<\/figure>\n\n\n\n

The BDO registration number is not a number that the entrepreneur creates on its own. It is assigned by the marshal of the voivodship when making an entry in the register. After registration, the entity receives an individual number which identifies it in the system. In practice, the entrepreneur can find it both in the documents related to the entry and later in the BDO system itself. Official communications concerning the BDO login also show that this number has the format of 9-digit<\/strong> and is used when linking an entity account to a user. Equally importantly, the entity register in BDO is publicly accessible, so the contractor number can also be verified externally by checking its presence and scope of activities in the register. This is of great practical importance when working with companies collecting waste, transporting waste or operating in product obligations.<\/p>\n\n\n\n

On which documents must the registration number be affixed?<\/strong><\/h2>\n\n\n\n

This is where most errors occur. Official sources from BDO and Business.gov.co.uk clearly indicate that the registration number should be included on documents related to product and waste activities. For example, this will include VAT invoices, fiscal receipts, sales and purchase contracts, reports, waste transfer notes and waste record sheets. This means that the BDO number is not an add-on \u201ejust in case\u201d, but a required element in a specific documentary turnover. In practice, traders often make two opposite mistakes: either they do not include the number where it is required, or they try to insert it everywhere, including where the regulations do not provide for it. The safest approach is simple: the BDO number should appear where the document relates to the activity covered by the registration.<\/p>\n\n\n\n

When does the BDO number not need to be provided?<\/strong><\/h2>\n\n\n\n

This is just as important as the list of mandatory documents. BDO makes it clear that the registration number does not need to be included on personnel and day-to-day office administration documents, on documents submitted to the tax office and on other documents that are not directly related to the activities covered by the registration. This shows that the BDO number does not work like the NIP or REGON, i.e. it is not a universal number for every activity of the entrepreneur. It is functional in nature and should be used where the trader operates in the area of products and waste covered by the register. In practice, this means that the company should sort out its own workflow and determine which documents are \u201eenvironmental\u201d or result from the activities covered by the register, rather than mechanically adding the number to every piece of paper leaving the company.<\/p>\n\n\n\n

Frequently asked questions<\/strong><\/p>\n\n\n

\n
\n
\n

Who assigns the BDO registration number?<\/strong><\/h3>\n
\n\n

The registration number is assigned by the province marshal when the entrepreneur is entered in the BDO register.<\/p>\n\n<\/div>\n<\/div>\n

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Where do I check a contractor's BDO number?<\/strong><\/h3>\n
\n\n

This can be done in the publicly accessible entity register BDO. The register is publicly accessible and allows you to check the scope of the entity's activities.<\/p>\n\n<\/div>\n<\/div>\n

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On which documents must the BDO number be affixed?<\/strong><\/h3>\n
\n\n

On documents related to product and waste activities, e.g. VAT invoices, fiscal receipts, purchase contracts, reports<\/p>\n\n<\/div>\n<\/div>\n

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Does the BDO number need to be entered on all company documents?<\/strong><\/h3>\n
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No. The number does not have to be included on personnel documents, documents submitted to the tax office or other documents not directly related to the activity covered by the entry.<\/p>\n\n<\/div>\n<\/div>\n

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What does the BDO number look like?<\/strong><\/h3>\n
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BDO's official log-in material indicates that this is a nine-digit number.<\/p>\n\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n

If you want to check that your company is using the BDO registration number correctly and that company documents are marked in accordance with the regulations, it is worth sorting this out before a problem arises in an audit or with a contractor. Details can be found in the Contact<\/a><\/strong> page there, you can describe your situation and match the scope of support to your company's real responsibilities.<\/p>\n\n\n\n

<\/p>","protected":false},"excerpt":{"rendered":"

The BDO registration number is one of those elements that businesses often treat as a mere formal number, until it becomes apparent that not using it can become a problem in audits, in the circulation of documents or in relations with contractors.<\/p>","protected":false},"author":2,"featured_media":6165,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[4],"tags":[54],"class_list":["post-6163","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-baza-wiedzy","tag-numery-bdo"],"taxonomy_info":{"category":[{"value":4,"label":"Baza wiedzy"}],"post_tag":[{"value":54,"label":"Numery BDO"}]},"featured_image_src_large":["https:\/\/ekopro-grupa.pl\/wp-content\/uploads\/2026\/03\/image-84.png",1024,1024,false],"author_info":{"display_name":"Jakub Nalewa","author_link":"https:\/\/ekopro-grupa.pl\/en\/author\/jakub-nalewa\/"},"comment_info":0,"category_info":[{"term_id":4,"name":"Baza wiedzy","slug":"baza-wiedzy","term_group":0,"term_taxonomy_id":4,"taxonomy":"category","description":"","parent":0,"count":195,"filter":"raw","cat_ID":4,"category_count":195,"category_description":"","cat_name":"Baza wiedzy","category_nicename":"baza-wiedzy","category_parent":0}],"tag_info":[{"term_id":54,"name":"Numery BDO","slug":"numery-bdo","term_group":0,"term_taxonomy_id":54,"taxonomy":"post_tag","description":"","parent":0,"count":1,"filter":"raw"}],"_links":{"self":[{"href":"https:\/\/ekopro-grupa.pl\/en\/wp-json\/wp\/v2\/posts\/6163","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ekopro-grupa.pl\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ekopro-grupa.pl\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ekopro-grupa.pl\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ekopro-grupa.pl\/en\/wp-json\/wp\/v2\/comments?post=6163"}],"version-history":[{"count":1,"href":"https:\/\/ekopro-grupa.pl\/en\/wp-json\/wp\/v2\/posts\/6163\/revisions"}],"predecessor-version":[{"id":6166,"href":"https:\/\/ekopro-grupa.pl\/en\/wp-json\/wp\/v2\/posts\/6163\/revisions\/6166"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ekopro-grupa.pl\/en\/wp-json\/wp\/v2\/media\/6165"}],"wp:attachment":[{"href":"https:\/\/ekopro-grupa.pl\/en\/wp-json\/wp\/v2\/media?parent=6163"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ekopro-grupa.pl\/en\/wp-json\/wp\/v2\/categories?post=6163"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ekopro-grupa.pl\/en\/wp-json\/wp\/v2\/tags?post=6163"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}