{"id":37447,"date":"2026-10-19T08:30:00","date_gmt":"2026-10-19T06:30:00","guid":{"rendered":"https:\/\/kpw.law\/?p=37447"},"modified":"2026-10-19T10:51:27","modified_gmt":"2026-10-19T08:51:27","slug":"proof-of-authorship-in-response-to-a-cease-and-desist-letter","status":"publish","type":"post","link":"https:\/\/kpw.law\/en\/proof-of-authorship-in-response-to-a-cease-and-desist-letter\/","title":{"rendered":"Proof of Authorship in Response to a Cease and Desist Letter"},"content":{"rendered":"\n<div class=\"wp-block-group alignfull v4-pattern-hero v4-pattern-hero--post is-style-background-blend is-style-arrow has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-cover alignfull v4-pattern-hero__cover\" style=\"padding-top:var(--wp--preset--spacing--80);padding-bottom:var(--wp--preset--spacing--80);min-height:75vh;aspect-ratio:unset;\"><img data-dominant-color=\"4c91b2\" data-has-transparency=\"false\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" sizes=\"auto, 100vw\" class=\"wp-block-cover__image-background wp-image-37445 size-large not-transparent\" alt=\"Nachweis der Urheberschaft bei Abmahnung, urheberrechtliche Abmahnung, eidesstattliche Versicherung, Urheberrecht, Rechtsanwalt\" src=\"https:\/\/kpw.law\/wp-content\/uploads\/Nachweis-der-Urheberschaft-bei-Abmahnung-1024x576.avif\" style=\"--dominant-color: #4c91b2; object-position:52% 62%\" data-object-fit=\"cover\" data-object-position=\"52% 62%\" srcset=\"https:\/\/kpw.law\/wp-content\/uploads\/Nachweis-der-Urheberschaft-bei-Abmahnung-1024x576.avif 1024w, https:\/\/kpw.law\/wp-content\/uploads\/Nachweis-der-Urheberschaft-bei-Abmahnung-300x169.avif 300w, https:\/\/kpw.law\/wp-content\/uploads\/Nachweis-der-Urheberschaft-bei-Abmahnung-768x432.avif 768w, https:\/\/kpw.law\/wp-content\/uploads\/Nachweis-der-Urheberschaft-bei-Abmahnung-1536x864.avif 1536w, https:\/\/kpw.law\/wp-content\/uploads\/Nachweis-der-Urheberschaft-bei-Abmahnung-2048x1152.avif 2048w\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-base-background-color has-background-dim-0 has-background-dim\"><\/span><div class=\"wp-block-cover__inner-container has-global-padding is-layout-constrained wp-block-cover-is-layout-constrained\">\n<div style=\"height:5em\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-group alignwide has-global-padding is-content-justification-left is-layout-constrained wp-container-core-group-is-layout-97ba1214 wp-block-group-is-layout-constrained\" style=\"margin-top:0;margin-bottom:var(--wp--preset--spacing--80);padding-top:var(--wp--preset--spacing--60)\">\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-container-core-group-is-layout-a6a2a725 wp-block-group-is-layout-constrained\">\r\n<h1 id=\"multirow-headline-block_82c0ad56360e03f53fdcd5ac0a82e063\" class=\"wp-block-visual4-multirow-headline\">\r\n    <div class=\"wp-block-visual4-multirow-headline\">\n\n<p class=\"has-gigantic-font-size wp-block-paragraph\" style=\"margin-top:0;margin-bottom:0;margin-left:0%;padding-top:0;padding-bottom:0;font-style:normal;font-weight:1000;line-height:1;text-transform:uppercase\">Proof <\/p>\n\n\n\n<p class=\"has-text-align-left has-huge-font-size wp-block-paragraph\" style=\"margin-top:0;margin-right:0;margin-bottom:0;margin-left:15%;padding-top:0;padding-bottom:0;font-style:normal;font-weight:1000;line-height:1;text-transform:uppercase\">of<\/p>\n\n\n\n<p class=\"has-contrast-color has-text-color has-link-color has-gigantic-font-size wp-elements-1 wp-block-paragraph\" style=\"margin-top:0;margin-bottom:0;margin-left:0%;padding-top:0;padding-bottom:0;font-style:normal;font-weight:1000;line-height:1;text-transform:uppercase\"><span class=\"v4-marker-highlight-background\">authorship. <\/span><\/p>\n\n<\/div> \r\n<\/h1>\n\n\n<div class=\"wp-block-group has-small-font-size is-nowrap is-layout-flex wp-container-core-group-is-layout-878d3859 wp-block-group-is-layout-flex\" style=\"margin-top:var(--wp--preset--spacing--20);margin-bottom:0;padding-top:0;padding-bottom:0;font-style:italic;font-weight:300;text-transform:uppercase\"><div style=\"font-style:italic;font-weight:300;text-transform:uppercase\" class=\"wp-block-post-date has-small-font-size\"><time datetime=\"2026-10-19T08:30:00+02:00\">19. October 2026<\/time><\/div>\n\n\n<p class=\"wp-block-paragraph\">of<\/p>\n\n\n<div style=\"font-style:italic;font-weight:600\" class=\"wp-block-post-author-name\">Clemens Pfitzer<\/div><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group alignwide has-global-padding is-content-justification-left is-layout-constrained wp-container-core-group-is-layout-3b99a472 wp-block-group-is-layout-constrained\">\n<p class=\"wp-block-paragraph\"><strong>Does a copyright cease and desist letter have to prove that the party issuing the letter actually created the work? And what happens if the recipient demands proof of authorship but refuses to provide an affidavit from the outset? <\/strong><\/p>\n<\/div>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n<h2 class=\"wp-block-heading\">Figurine Designs from China and a Dispute Over Costs<\/h2>\n\n<p class=\"wp-block-paragraph\">A retailer was selling merchandise featuring three character designs. According to her, she had sourced the merchandise from a Chinese manufacturer. She stated that she had been working with this manufacturer for years without ever having had a dispute over copyrights. A woman who considered herself the creator of the designs sent the retailer a cease and desist letter. A cease and desist letter is an out-of-court demand to cease an infringement and to provide a binding assurance to that effect.<\/p>\n\n<p class=\"wp-block-paragraph\">The seller responded with a letter from her lawyer dated January 23, 2026. She demanded proof that the party issuing the cease and desist letter had actually created the works. At the same time, she stated that the submission of an affidavit was not sufficient for this purpose. An affidavit is a written statement whose accuracy is expressly attested to in lieu of an oath.<\/p>\n\n<p class=\"wp-block-paragraph\">The party issuing the cease and desist letter then filed a motion with the Regional Court of Frankfurt am Main for a preliminary injunction\u2014that is, a court order issued in summary proceedings. The motion was accompanied by an affidavit in which she stated that she had created the three works shown in 2013. The Regional Court heard the dealer\u2019s side of the story and indicated that the application appeared to be well-founded. The dealer then issued a cease-and-desist declaration subject to a penalty clause, and both parties declared the proceedings settled.<\/p>\n\n<p class=\"wp-block-paragraph\">The only remaining issue was who would bear the costs. In <a href=\"https:\/\/www.rv.hessenrecht.hessen.de\/bshe\/document\/LARE260000368\">its ruling dated March 10, 2026\u2014Case No. 2-06 O 41\/26\u2014<\/a> the Regional Court ordered the retailer to pay them.<\/p>\n\n<h2 class=\"wp-block-heading\">The retailer&#8217;s objection<\/h2>\n\n<p class=\"wp-block-paragraph\">The merchant filed an immediate appeal. She cited a cost provision in the Code of Civil Procedure. According to that provision, the petitioner bears the costs if the opposing party gave no cause for the legal proceedings and immediately acknowledged the claim.<\/p>\n\n<p class=\"wp-block-paragraph\">She had given no cause for such a claim. To date, the party issuing the cease and desist letter has not provided any proof of her authorship. An online search reveals that a character such as \u201cRudolf the Reindeer\u201d has been in use since the 1930s. The affidavit was only submitted with the court motion and was, moreover, very brief. Despite the rejection, the party issuing the cease and desist letter could have sent it and provided a link to its website. Furthermore, the cease and desist letter is invalid because it did not itemize the attorney\u2019s fees.<\/p>\n\n<h2 class=\"wp-block-heading\">The Frankfurt Higher Regional Court dismisses the appeal<\/h2>\n\n<p class=\"wp-block-paragraph\">In <a href=\"https:\/\/www.rv.hessenrecht.hessen.de\/jportal\/recherche3doc\/OLG_Frankfurt_11_W_5-26_LARE260001203.pdf\">its decision dated August 17, 2026\u2014Case No. 11 W 5\/26<\/a> \u2014the Higher Regional Court of Frankfurt am Main dismissed the immediate appeal, with costs to be borne by the retailer.<\/p>\n\n<h2 class=\"wp-block-heading\">Does the cease and desist letter have to include proof of authorship?<\/h2>\n\n<p class=\"wp-block-paragraph\">No, not as a general rule. In the court\u2019s view, the party issuing the cease and desist letter is not required to submit proof of authorship along with the cease and desist letter itself. The only exception is if the party specifically refers to certain supporting documents in the cease and desist letter. This follows from the fact that even a well-founded lawsuit is not required to include offers of evidence.<\/p>\n\n<p class=\"wp-block-paragraph\">For summary proceedings, an affidavit is sufficient to establish a prima facie case. Establishing a prima facie case means that the court must consider a claim to be highly probable; full proof is not necessary. The statement by the party issuing the cease and desist letter that it had created the three works in 2013 was sufficient. Further details, such as the exact date of creation or the manner of exploitation, were not required. Copyright protection does not require that the author exploit their work in any way.<\/p>\n\n<p class=\"wp-block-paragraph\">Nor was there any need for references to the sender\u2019s sales activities or websites. Such references are neither necessary nor sufficient to prove authorship. The fact that the retailer has been working with her manufacturer for years without any complaints is irrelevant to the issue of costs.<\/p>\n\n<h2 class=\"wp-block-heading\">What applies if the recipient of the cease-and-desist letter requests proof?<\/h2>\n\n<p class=\"wp-block-paragraph\">The court expressly left open the question of whether the party issuing the cease and desist letter must provide proof as soon as the recipient requests it. That was not the issue. The retailer had, in fact, already rejected the most obvious form of proof in advance.<\/p>\n\n<div class=\"wp-block-group v4-pattern-general-quote-box has-kpw-yellow-background-color has-background has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\" style=\"margin-top:var(--wp--preset--spacing--60);margin-bottom:var(--wp--preset--spacing--60)\">\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\" style=\"padding-right:var(--wp--preset--spacing--70);padding-left:var(--wp--preset--spacing--70)\">\n<p class=\"wp-block-paragraph\">In any case, the petitioner was therefore entitled to assume that the pretrial submission of an affidavit\u2014which, as explained, is sufficient in preliminary injunction proceedings to establish a prima facie case of authorship\u2014 would not prompt the respondent to issue a cease-and-desist declaration or otherwise allow the respondent to prevail without the issuance of the preliminary injunction.<\/p>\n<\/blockquote>\n<\/div>\n\n<p class=\"wp-block-paragraph\">The party issuing the cease and desist letter was therefore entitled to go to court immediately without any risk of incurring costs. The fact that she could have sent the insurance policy despite the rejection is irrelevant. There is also a second consideration. The retailer continued to regard the insurance as insufficient even during the complaint proceedings. It can therefore be assumed that she would not have issued a cease-and-desist declaration even if the insurance had been sent earlier.<\/p>\n\n<h2 class=\"wp-block-heading\">Does the cease and desist letter have to specify the attorney\u2019s fees?<\/h2>\n\n<p class=\"wp-block-paragraph\">The Copyright Act requires that a cease and desist letter itemize the asserted monetary claims for damages and reimbursement of expenses. If such mandatory information is missing, the cease and desist letter is invalid.<\/p>\n\n<p class=\"wp-block-paragraph\">In the court\u2019s view, this obligation applies only if the cease and desist letter actually demands payment. The party issuing the cease and desist letter had merely announced that it would specify the amount of damages and attorneys\u2019 fees in a subsequent letter. The fact that it is customary to specify the costs of the cease and desist letter does not make it an obligation.<\/p>\n\n<h2 id=\"h-fazit\" class=\"wp-block-heading\">Conclusion<\/h2>\n\n<div class=\"wp-block-columns v4-pattern-text-copy-half-col is-layout-flex wp-container-core-columns-is-layout-f56f613f wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"wp-block-paragraph\">Anyone who demands proof and rejects the form typically used in summary proceedings in advance cannot later invoke the lack of such proof. The ruling is favorable for <a href=\"https:\/\/kpw.law\/en\/fields-of-law\/copyright\/\">copyright<\/a> holders. It confirms that the <a href=\"https:\/\/kpw.law\/en\/topics\/cease-and-desist-letter\/\">cease and desist letter<\/a> does not constitute an anticipatory taking of evidence.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, the court left the truly interesting question open. It remains unclear whether the party issuing the cease and desist letter must provide evidence if the recipient of the letter requests it in good faith and without reservation. Particularly in the case of designs that come in many variations, a retailer\u2019s interest in verifying them is understandable. In practice, this is the more important scenario.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div>\n<\/div>\n\n<div class=\"wp-block-group alignwide has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\" style=\"margin-top:var(--wp--preset--spacing--80);margin-bottom:var(--wp--preset--spacing--80)\">\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-group alignwide v4-pattern-cta-box has-secondary-background-color has-background has-global-padding is-layout-constrained wp-container-core-group-is-layout-0c8cea62 wp-block-group-is-layout-constrained\" style=\"padding-top:0;padding-right:0;padding-bottom:0\">\n<div class=\"wp-block-columns alignwide are-vertically-aligned-top v4-pattern-cta-box__columns is-layout-flex wp-container-core-columns-is-layout-71c143ff wp-block-columns-is-layout-flex\" style=\"padding-top:0;padding-bottom:0\">\n<div class=\"wp-block-column is-vertically-aligned-top v4-pattern-cta-box__columns-column is-layout-flow wp-container-core-column-is-layout-fb77afb0 wp-block-column-is-layout-flow\" style=\"padding-top:var(--wp--preset--spacing--50);padding-bottom:0;flex-basis:60%\">\n<div class=\"wp-block-group alignwide has-global-padding is-content-justification-right is-layout-constrained wp-container-core-group-is-layout-1931a79c wp-block-group-is-layout-constrained\">\r\n<div id=\"multirow-headline-block_886360bbacdef2c1eb87d87bd3938dfd\" class=\"wp-block-visual4-multirow-headline alignwide\">\r\n    <div class=\"wp-block-visual4-multirow-headline\">\n\n<p class=\"has-text-align-left has-huge-font-size wp-block-paragraph\" style=\"margin-top:0;margin-bottom:0;margin-left:0%;padding-top:0;padding-bottom:0;font-style:normal;font-weight:1000;line-height:1;text-transform:uppercase\">We\u2019d be happy to<\/p>\n\n\n\n<p class=\"has-text-align-left has-x-large-font-size wp-block-paragraph\" style=\"margin-top:0;margin-right:0;margin-bottom:0;margin-left:8%;padding-top:0;padding-bottom:0;font-style:normal;font-weight:1000;line-height:0.9;text-transform:uppercase\">advise you on <\/p>\n\n\n\n<p class=\"has-text-align-left has-huge-font-size wp-block-paragraph\" style=\"margin-top:0;margin-right:0;margin-bottom:0;margin-left:0%;padding-top:0;padding-bottom:0;font-style:normal;font-weight:1000;line-height:0.9;text-transform:uppercase\">Copyright!<\/p>\n\n<\/div> \r\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-9da75b5c wp-block-group-is-layout-flex\" style=\"margin-top:var(--wp--preset--spacing--30);margin-bottom:var(--wp--preset--spacing--30)\">\r\n\r\n<div class=\"wp-block-visual4-contact-modal__button\">\r\n            \r\n        <div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\r\n            \r\n\r\n<div class=\"wp-block-button v4-contact-modal-button is-style-fill\" style=\"font-style:normal;font-weight:600\" data-form-id=\"8\"><a class=\"wp-block-button__link has-contrast-color has-base-background-color has-text-color has-background has-link-color wp-element-button\">Contact Form<\/a><\/div>\r\n\r\n        <\/div>\r\n        \r\n    <\/div>\n\n\n<div class=\"wp-block-buttons is-style-mobile-only is-content-justification-left is-layout-flex wp-container-core-buttons-is-layout-a768b15a wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-arrow is-style-fill\"><a class=\"wp-block-button__link has-base-background-color has-background wp-element-button\" href=\"tel:4971141019030\" style=\"padding-right:var(--wp--preset--spacing--50);padding-left:var(--wp--preset--spacing--50);font-style:normal;font-weight:600\">Call now!<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-top v4-pattern-cta-box__columns-column v4-pattern-cta-box__columns-column--image is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:40%\">\n<figure class=\"wp-block-image size-full v4-pattern-cta-box__columns-column__image\"><img decoding=\"async\" src=\"https:\/\/kpw.law\/wp-content\/themes\/kpw-law\/assets\/samples\/person-cropped.png\" alt=\"\" class=\"wp-image-23155\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Does a cease and desist letter have to include proof of authorship? The Higher Regional Court of Frankfurt am Main says no and orders the retailer who received the letter to pay the costs.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[4904],"tags":[6726,5172,6132],"thema":[],"rechtsgebiet":[4923],"produkt":[],"class_list":["post-37447","post","type-post","status-publish","format-standard","hentry","category-general","tag-authorship","tag-copyright-cease-and-desist-letter","tag-recognition-of-authorship","rechtsgebiet-copyright"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.6 (Yoast SEO v28.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Proof of Authorship in Response to a Cease and Desist Letter<\/title>\n<meta name=\"description\" content=\"Does a cease and desist letter have to include proof of authorship? The Higher Regional Court of Frankfurt am Main says no and orders the retailer who received the letter to pay the costs.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/kpw.law\/en\/proof-of-authorship-in-response-to-a-cease-and-desist-letter\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Proof of Authorship in Response to a Cease and Desist Letter\" \/>\n<meta property=\"og:description\" content=\"Does a cease and desist letter have to include proof of authorship? The Higher Regional Court of Frankfurt am Main says no and orders the retailer who received the letter to pay the costs.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/kpw.law\/en\/proof-of-authorship-in-response-to-a-cease-and-desist-letter\/\" \/>\n<meta property=\"og:site_name\" content=\"KPW Rechtsanw\u00e4lte und Fachanw\u00e4lte\" \/>\n<meta property=\"article:published_time\" content=\"2026-10-19T06:30:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-19T08:51:27+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/kpw.law\/wp-content\/uploads\/Branchen-scaled.avif\" \/>\n\t<meta property=\"og:image:width\" content=\"2560\" \/>\n\t<meta property=\"og:image:height\" content=\"1440\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Clemens Pfitzer\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@clemenspfitzer\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Clemens Pfitzer\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":[\"Article\",\"BlogPosting\"],\"@id\":\"https:\\\/\\\/kpw.law\\\/en\\\/proof-of-authorship-in-response-to-a-cease-and-desist-letter\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/kpw.law\\\/en\\\/proof-of-authorship-in-response-to-a-cease-and-desist-letter\\\/\"},\"author\":{\"name\":\"Clemens Pfitzer\",\"@id\":\"https:\\\/\\\/kpw.law\\\/en\\\/#\\\/schema\\\/person\\\/bb7a5be61de17c2c027e254e249214bd\"},\"headline\":\"Proof of Authorship in Response to a Cease and Desist Letter\",\"datePublished\":\"2026-10-19T06:30:00+00:00\",\"dateModified\":\"2026-10-19T08:51:27+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/kpw.law\\\/en\\\/proof-of-authorship-in-response-to-a-cease-and-desist-letter\\\/\"},\"wordCount\":1159,\"publisher\":{\"@id\":\"https:\\\/\\\/kpw.law\\\/en\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/kpw.law\\\/en\\\/proof-of-authorship-in-response-to-a-cease-and-desist-letter\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/kpw.law\\\/wp-content\\\/uploads\\\/Nachweis-der-Urheberschaft-bei-Abmahnung-1024x576.avif\",\"keywords\":[\"Authorship\",\"copyright cease and desist letter\",\"Recognition of authorship\"],\"articleSection\":[\"General\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/kpw.law\\\/en\\\/proof-of-authorship-in-response-to-a-cease-and-desist-letter\\\/\",\"url\":\"https:\\\/\\\/kpw.law\\\/en\\\/proof-of-authorship-in-response-to-a-cease-and-desist-letter\\\/\",\"name\":\"Proof of Authorship in Response to a Cease and Desist Letter\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/kpw.law\\\/en\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/kpw.law\\\/en\\\/proof-of-authorship-in-response-to-a-cease-and-desist-letter\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/kpw.law\\\/en\\\/proof-of-authorship-in-response-to-a-cease-and-desist-letter\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/kpw.law\\\/wp-content\\\/uploads\\\/Nachweis-der-Urheberschaft-bei-Abmahnung-1024x576.avif\",\"datePublished\":\"2026-10-19T06:30:00+00:00\",\"dateModified\":\"2026-10-19T08:51:27+00:00\",\"description\":\"Does a cease and desist letter have to include proof of authorship? 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