Special care must be taken when incorporating third-party materials: Carelessness can lead to infringements of the property rights of others (copyright, personal rights, trademark rights, etc.). An infringement can have a number of unintended consequences. These include costly warnings, actions for injunctive relief or removal and possibly compensation for damages. In this overview, you will learn how to avoid an infringement of rights and how to react to a warning letter and to infringements of your property rights by others
How to avoid an infringement
- If possible, use your own material or material for which all rights (in particular copyrights, trademark rights, personal rights) have been clarified.
- Is the third-party material licensed? Pay attention to the rights of use granted by the license. Creative Commons (CC) licensed content may generally be used. However, depending on the type of Creative Commons license, there may be restrictions (e.g. no commercial use). Be sure to read the license text. For CC licenses, you can find the license text here:

Screenshot from https://creativecommons.org/licenses/by/4.0/deed.de
- Is there no license notice? Please note that third-party works are also protected by copyright without a copyright notice from their creation and generally 70 years after the death of the author! If this period has already expired, you may incorporate a third-party work into open educational materials.
If the work is not yet in the public domain, you may quote it in your materials, § 51 UrhG. Make sure that the purpose of the quotation (content-related discussion of the third-party work) is fulfilled, that you only quote as much as the purpose of the quotation requires and that the quotation is excluded from the license (Section 51 UrhG does not entitle you to co-license the third-party work!) - If in doubt, obtain the necessary rights of use by means of an agreement (in writing for reasons of proof). Our sample templates for granting rights can help you with this.
- Are you allowed to use the work of others? Please remember that third-party material must generally be provided with a license notice (exceptions: public domain works, CC Zero, etc.). Place the license notice and copyright information as close as possible to the work so that you comply with your obligation to acknowledge authorship, 13 S.1 UrhG .
- Make sure that the author(s) and not the person(s) who posted the work online is/are named. Adhere to the specifications of the licensor, cf. 13 UrhG.
- Follow the TULLU rule for correct license information when using Creative Commons licensed materials.
- If people (or their voice — right to one’s own word!) are recognizable in photo, video or audio recordings (e.g. interviews), ask them for permission before publishing the recordings. Otherwise there may be a conflict with general personal rights and data protection. Obtain written consent from the persons depicted. Describe as specifically as possible what the photos are being taken and used for. Our sample template for consent to photo and video recordings can provide initial guidance.
- Quote correctly: if in doubt, do not quote entire works; remember that a quote is only permitted “if the scope of use is justified by the specific purpose”, Section 51 UrhG. In this article you can read how to quote correctly:
- Please note that you are generally only permitted to use third-party works within the scope of Section 60a UrhG (teaching and instruction) in limited quantities (up to 15%) and in restricted public spheres (sharing with anyone on the Internet, for example, is not covered by Section 60a UrhG). Do not forget to cite the source (§ 63 UrhG)!
Recommended procedure in the event of a warning letter
If you have already received a warning letter, you should proceed with caution in order to avoid (possibly further) costs and legal proceedings. A warning letter is an out-of-court request (usually a letter from a lawyer) to refrain from certain behavior. The warning letter is often accompanied by a so-called declaration to cease and desist with a penalty clause. By signing the declaration, the person being warned undertakes to refrain from the alleged infringement (e.g. use of a logo on a website) in future and to pay a contractual penalty in the event of an infringement. The declaration to cease and desist is intended to ensure that repeated or further infringements (risk of repetition) do not occur.
How should I react to a warning letter?
- Take the warning seriously. Even a warning letter by e‑mail that has landed in the spam folder is not fake per se. There is no prescribed form for a warning letter. The warning letter can be sent by letter, fax, e‑mail or even verbally. A warning letter is a legally significant declaration. Legally significant declarations become effective upon receipt by the recipient. In the case of an e‑mail, a declaration is received as soon as it reaches the recipient’s inbox (this also includes the spam folder!). Time limits are also calculated from the time a declaration is received. If you do not respond to a warning letter and allow the deadlines specified therein to elapse, you risk legal proceedings and additional costs.
- Read the warning letter carefully. Not every warning letter is genuine. It can happen that you receive a so-called fake warning letter by email. It may look like a letter from a well-known law firm. You may be able to tell that it is not a genuine warning letter by the different bank details and very high claims for damages. If you receive such an e‑mail, call the law firm named in the letter and clarify the facts. Dial the number from the law firm’s website and not the one mentioned in the warning letter.
- Handelt es sich um eine echte Abmahnung, muss diese nicht immer wirksam sein. Wird z.B. eine Urheberrechtsverletzung abgemahnt, muss die Abmahnung nach § 97a Abs. 1, 2 UrhG folgende Angaben enthalten:
- Name/company of the injured person,
- exact description of the infringement,
- Breakdown of the payment claims asserted (compensation for damages, reimbursement of expenses)
- The legal scope of the obligation to cease and desist (in the case of a cease and desist declaration with penalty clause).
If the warning does not contain one of these details, it is ineffective. An ineffective warning letter cannot trigger any cost consequences.
- If the warning is genuine and effective, it must be checked whether it is justified .
If the warning is unfounded (the accusation is not true: e.g. the person issuing the warning is not the author or rights holder, the date, time, IP address, type of infringement, etc. do not match), you should reply to the accusation. Possible means of defense are the counter warning and the negative declaratory action (action for a declaratory judgment that an infringement does not exist).
If it is doubtful whether the person issuing the warning has copyrights or rights of use to the work in question, you can dispute their legal status. If legal action is then taken, the allegedly infringed person must provide substantiated proof of their legal status. If the proof is successful, the person receiving the warning bears the cost risk.
If you have already instructed a lawyer to examine the warning letter, you are entitled to claim reimbursement of the necessary defense costs from the person issuing the warning letter under Section 97a (4) UrhG.
If the warning is justified (the person issuing the warning is the author or rights holder, the accusation is correct: e.g. date, time, IP address, type of infringement, etc. match), you should immediately cease or remove the infringement (e.g. remove photos from the website). However, it is not advisable to sign the cease-and-desist declaration with penalty clause that accompanies the warning letter too hastily. Remember: this document is a contract that is valid for life. The pre-formulated cease-and-desist declaration only takes the interests of the infringed person into account. For this reason, it is often too far-reaching (e.g. claims formulated too broadly/too generally, contractual penalty set too high). The cease-and-desist declaration can often be modified in your favor.
On the other hand, you should not take too long to review the cease-and-desist declaration. A (usually very short) deadline is set for submitting the cease-and-desist declaration. If this deadline expires, you risk a temporary injunction or an action for injunctive relief. It is therefore advisable to consult a lawyer at short notice to review and, if necessary, amend the declaration.
The same applies to any enclosed declaration on an out-of-court settlement. This pre-formulated declaration is often not appropriate either and should at best be adapted in your favor by a lawyer.
Further details on what to do in the event of a warning letter can be found in this e‑book, for example:
https://www.urheberrecht.de/urheberrechtsverletzung-was-tun/#ebookurheberrechtsverletzung
What you can do if your rights are violated on the portal
In the portal(www.twillo.de) you have the option of reporting infringements via our contact form or by email to our support team: info@twillo.de. In this case, we will check the suspicion and, if necessary, delete the infringing content. In the event of repeated infringements by the same person, this person may be excluded from using the portal. Please understand that we do not provide legal assistance.