{"id":7622,"date":"2026-03-01T19:34:18","date_gmt":"2026-03-02T02:34:18","guid":{"rendered":"https:\/\/ketoan.man.net.vn\/?p=7622"},"modified":"2026-03-01T20:18:33","modified_gmt":"2026-03-02T03:18:33","slug":"quy-dinh-ky-van-ban-bang-muc-xanh","status":"publish","type":"post","link":"https:\/\/ketoan.man.net.vn\/en\/quy-dinh-ky-van-ban-bang-muc-xanh\/","title":{"rendered":"Regulations require signing documents with blue ink."},"content":{"rendered":"<p><span style=\"font-weight: 400;\">Currently, using blue ink when signing paper documents is no longer a recommendation but a mandatory requirement under the law. This regulation replaces the previous understanding which only prohibited the use of pencils, red ink, or easily fading ink, leading many agencies to still choose black ink for signing.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Prior to 2020, according to Decree 110\/2004\/ND-CP, the law only stipulated that pencils, red ink, or easily fading ink should not be used when signing and issuing documents. Since there was no provision prohibiting black ink, many authorized individuals still used black ink pens during the signing and approval process.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">However, since March 5, 2020, Decree 30\/2020\/ND-CP has officially tightened the regulations. Clause 6 of Article 13 clearly states that for paper documents, the authorized person must sign with blue ink and not use ink that easily fades. This is a mandatory regulation aimed at enhancing the authenticity and long-term archival value of documents.<\/span><\/p>\n<div class=\"su-button-center\"><a href=\"https:\/\/drive.google.com\/file\/d\/1RsHjXAfgSm5fTwa9s0GH4RgpfK0tzo-r\/view?usp=sharing\/\" class=\"su-button su-button-style-flat\" style=\"color:#FFFFFF;background-color:#d9534f;border-color:#ae4340;border-radius:5px\" target=\"_self\" rel=\"noopener\"><span style=\"color:#FFFFFF;padding:0px 22px;font-size:17px;line-height:34px;border-color:#e58784;border-radius:5px;text-shadow:none\">  Download Summary File <\/span><\/a><\/div>\n<p>&nbsp;<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_88 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Index<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/ketoan.man.net.vn\/en\/quy-dinh-ky-van-ban-bang-muc-xanh\/#Tong_quan_ve_tham_quyen_ky_ban_hanh_van_ban\" >Overview of the authority to sign and issue documents<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/ketoan.man.net.vn\/en\/quy-dinh-ky-van-ban-bang-muc-xanh\/#So_sanh_quy_dinh_ve_mau_muc_ky_qua_cac_thoi_ky\" >Comparing regulations on ink color for signatures across different periods.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/ketoan.man.net.vn\/en\/quy-dinh-ky-van-ban-bang-muc-xanh\/#Ly_do_Phap_luat_bat_buoc_ky_van_ban_bang_muc_xanh\" >The reason why the law requires signing documents with blue ink.<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/ketoan.man.net.vn\/en\/quy-dinh-ky-van-ban-bang-muc-xanh\/#Nhan_dien_ban_chinh_nhanh_chong\" >Quickly identify the original.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/ketoan.man.net.vn\/en\/quy-dinh-ky-van-ban-bang-muc-xanh\/#Tang_do_ben_trong_luu_tru\" >Increase durability in storage.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/ketoan.man.net.vn\/en\/quy-dinh-ky-van-ban-bang-muc-xanh\/#Ho_tro_qua_trinh_so_hoa\" >Supporting the digitization process<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/ketoan.man.net.vn\/en\/quy-dinh-ky-van-ban-bang-muc-xanh\/#Quy_chuan_doi_voi_chu_ky_so_tren_van_ban_dien_tu\" >Standards for digital signatures on electronic documents<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/ketoan.man.net.vn\/en\/quy-dinh-ky-van-ban-bang-muc-xanh\/#Ket_luan\" >Conclude<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/ketoan.man.net.vn\/en\/quy-dinh-ky-van-ban-bang-muc-xanh\/#Thong_tin_lien_he_MAN_%E2%80%93_Master_Accountant_Network\" >Contact information MAN \u2013 Master Accountant Network<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Tong_quan_ve_tham_quyen_ky_ban_hanh_van_ban\"><\/span><b>Overview of the authority to sign and issue documents<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">According to Article 13 of Decree 30\/2020\/ND-CP, the signing and issuance of documents are determined based on the working mechanism of each agency or organization:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">For agencies operating under a hierarchical system: The head of the agency has the right to sign all documents or delegate the signing authority to a deputy within their assigned scope.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">For organizations operating under a collective leadership system: The head of the organization signs general documents on behalf of the collective leadership; the deputy signs on their behalf in their area of responsibility or as authorized.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Special cases: Authorization or direct signing by subordinates may be carried out in writing, with clearly defined scope and time limits.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Regardless of the circumstances, the general principle remains: the signatory is legally responsible for the content of the document. Furthermore, for paper documents, signatures must be in blue ink, in accordance with regulations.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"So_sanh_quy_dinh_ve_mau_muc_ky_qua_cac_thoi_ky\"><\/span><b>Comparing regulations on ink color for signatures across different periods.<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">To clearly see the changes in the legal approach to the color of ink used for signing documents, the regulations in Decree 110\/2004\/ND-CP and Decree 30\/2020\/ND-CP can be compared. The table below will help systematize the important criteria:<\/span><\/p>\n<table style=\"width: 100%; border-color: #000000;\" border=\"1\" cellspacing=\"2\" cellpadding=\"12\">\n<caption><b>Board:<\/b><span style=\"font-weight: 400;\"> Compare the regulations regarding ink color for signing documents.<\/span><\/caption>\n<tbody>\n<tr>\n<td style=\"text-align: center;\"><b>Criteria<\/b><\/td>\n<td style=\"text-align: center;\"><b>Decree 110\/2004\/ND-CP<\/b><\/td>\n<td style=\"text-align: center;\"><b>Decree 30\/2020\/ND-CP<\/b><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Ink color regulations<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Do not use pencils, red ink, or ink that fades easily.<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Blue ink must be used; fade-resistant ink is not permitted.<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Use black ink.<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Not prohibited<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Unauthorized<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Main purpose<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Ensure the basic form is maintained.<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Distinguishing between originals and copies, preventing forgery.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span style=\"font-weight: 400;\">Previously, because black ink was not prohibited, many documents were signed in black ink, making it difficult to distinguish between original and black-and-white photocopies. The new regulation has completely resolved this issue by requiring the uniform use of blue ink.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Ly_do_Phap_luat_bat_buoc_ky_van_ban_bang_muc_xanh\"><\/span><b>The reason why the law requires signing documents with blue ink.<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">To understand why the law mandates signing documents with blue ink, as stipulated in Decree 30\/2020\/ND-CP, it&#039;s necessary to consider various aspects, from the authenticity of the documents and their long-term archival value to management requirements in the context of administrative digitalization. The following analysis will clarify each specific benefit of this regulation.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Nhan_dien_ban_chinh_nhanh_chong\"><\/span><b>Quickly identify the original.<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Blue ink makes it easy to identify the original document with a direct signature and the red stamp. When making black and white copies, the blue signature usually stands out clearly from the black signature, thus reducing confusion.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tang_do_ben_trong_luu_tru\"><\/span><b>Increase durability in storage.<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Specialized blue ink pens offer high color retention and fade resistance. This is crucial for administrative record keeping, especially for documents with long-term legal or historical value.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Ho_tro_qua_trinh_so_hoa\"><\/span><b>Supporting the digitization process<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">When scanning documents for electronic management systems, the blue signature helps image processing software better separate the content, increasing the clarity and reliability of digital data.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Quy_chuan_doi_voi_chu_ky_so_tren_van_ban_dien_tu\"><\/span><b>Standards for digital signatures on electronic documents<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">In parallel with paper documents, Decree 30\/2020\/ND-CP also specifies regulations regarding digital signatures:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The digital signature image must be the genuine signature of an authorized person.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The digital signature is displayed in blue on a transparent background.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The location, size, and format must comply with Appendix I issued with the decree.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Thus, whether in a paper or electronic environment, the &quot;green&quot; element is consistently used to ensure legal validity and identification.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Ket_luan\"><\/span><b>Conclude<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">The mandatory requirement to sign documents with blue ink, as stipulated in Decree 30\/2020\/ND-CP, represents a significant step forward in standardizing document management, enhancing authenticity control, and preventing document forgery.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">To ensure legal validity and long-term archiving, authorized individuals should use high-quality, fade-resistant blue ink when signing paper documents. Simultaneously, agencies undergoing digital transformation must adhere to the standard blue digital signature display to ensure electronic documents have the same legal effect as paper documents, as per current regulations.<\/span><\/p>\n<div class=\"su-button-center\"><a href=\"https:\/\/ketoan.man.net.vn\/en\/lien-he\/\" class=\"su-button su-button-style-flat\" style=\"color:#FFFFFF;background-color:#d9534f;border-color:#ae4340;border-radius:5px\" target=\"_self\"><span style=\"color:#FFFFFF;padding:0px 22px;font-size:17px;line-height:34px;border-color:#e58784;border-radius:5px;text-shadow:none\">  Contact Us for Consultation  <\/span><\/a><\/div>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Thong_tin_lien_he_MAN_%E2%80%93_Master_Accountant_Network\"><\/span><b>Contact information MAN \u2013 Master Accountant Network<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Address: No. 19A, Street 43, Tan Thuan Ward, Ho Chi Minh City<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Mobile\/Zalo: 0903 963 163 \u2013 0903 428 622<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">E-mail: <\/span><a href=\"mailto:man@man.net.vn\"><span style=\"font-weight: 400;\">man@man.net.vn<\/span><\/a><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Content production by: Mr. <\/span><a href=\"https:\/\/man.net.vn\/le-hoang-tuyen\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">Le Hoang Tuyen<\/span><\/a><span style=\"font-weight: 400;\"> \u2013 Founder &amp; CEO MAN \u2013 Master Accountant Network, Vietnamese CPA Auditor with over 30 years of experience in Accounting, Auditing and Financial Consulting.<\/span><\/p>","protected":false},"excerpt":{"rendered":"<p>Hi\u1ec7n nay, vi\u1ec7c s\u1eed d\u1ee5ng m\u1ef1c xanh khi k\u00fd v\u0103n b\u1ea3n gi\u1ea5y kh\u00f4ng c\u00f2n l\u00e0 khuy\u1ebfn ngh\u1ecb m\u00e0 \u0111\u00e3 tr\u1edf th\u00e0nh y\u00eau c\u1ea7u b\u1eaft bu\u1ed9c theo quy \u0111\u1ecbnh ph\u00e1p lu\u1eadt. Quy \u0111\u1ecbnh n\u00e0y thay th\u1ebf cho c\u00e1ch hi\u1ec3u tr\u01b0\u1edbc \u0111\u00e2y v\u1ed1n ch\u1ec9 c\u1ea5m d\u00f9ng b\u00fat ch\u00ec, m\u1ef1c \u0111\u1ecf ho\u1eb7c m\u1ef1c d\u1ec5 phai, n\u00ean nhi\u1ec1u c\u01a1 [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":7623,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-7622","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"_links":{"self":[{"href":"https:\/\/ketoan.man.net.vn\/en\/wp-json\/wp\/v2\/posts\/7622","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ketoan.man.net.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ketoan.man.net.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ketoan.man.net.vn\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/ketoan.man.net.vn\/en\/wp-json\/wp\/v2\/comments?post=7622"}],"version-history":[{"count":2,"href":"https:\/\/ketoan.man.net.vn\/en\/wp-json\/wp\/v2\/posts\/7622\/revisions"}],"predecessor-version":[{"id":7631,"href":"https:\/\/ketoan.man.net.vn\/en\/wp-json\/wp\/v2\/posts\/7622\/revisions\/7631"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ketoan.man.net.vn\/en\/wp-json\/wp\/v2\/media\/7623"}],"wp:attachment":[{"href":"https:\/\/ketoan.man.net.vn\/en\/wp-json\/wp\/v2\/media?parent=7622"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ketoan.man.net.vn\/en\/wp-json\/wp\/v2\/categories?post=7622"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ketoan.man.net.vn\/en\/wp-json\/wp\/v2\/tags?post=7622"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}