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Göttinger Arbeitskreis e. V. (Managing Chairman from 2000 to 2003, President from 2014)
Studiengruppe für Politik und Völkerrecht (Head) [➣further informations]
Danziger Naturforschende Gesellschaft e. V. (President)
Marburger Gelehrten-Gesellschaft e. V. (Board of Association) [➣further informations] [➣book orders]
Marburger Juristische Gesellschaft e. V. (Founder and Chairman until 2017)
EU-China Institute for Comparative Law at the University for Finance and Economics in Nanjing, People's Republic of China (Founder)
Association for the Study of the World Refugee Problem - AWR (Board of Trustees)
Internationales Institut für Nationalitätenrecht und Regionalismus e. V. (Board of Trustees)
Marburger Gesellschaft für wissenschaftliche Zusammenarbeit mit arabischen Staaten (Board of Association until dissolution)
Freundschaftsgesellschaft Deutschland - Belarus e. V. (Board of Association)
Center for Human Rights and Good Governance in Iringa, Tansania (Founder)
Marburger Universitätsbund e. V. (Board of Trustees)
Vereinigung der deutschen Staatsrechtslehrer (Member)
Deutsche Gesellschaft für Internationales Recht (Member)
International Commission of Jurists (Member until 2025)
Gesellschaft für Deutschlandforschung (Member)
Forschungsstelle für Finanzdienstleistungsrecht (Association Spokesman until 2016) (Member) [➣book orders]
Forschungsstelle Mittelständische Wirtschaft (Association Spokesman until 2016) (Member)
Internationale Forschungs- und Dokumentationszentrum Kriegsverbrecherprozesse (ICWC)
Forschungsstelle für Pharmarecht (Member)
Interdisziplinäre Arbeitsgruppe Europäische Studien (Association Spokesman until 2016) (Member)
I. Name and address of the controller
The controller within the meaning of the GDPR is
II. General information on data processing
1. Scope of the processing of personal data
We process personal data of our users only to the extent necessary to provide and optimize a functional website and our content and services.
The processing of personal data of our users only takes place regularly with your consent. An exception applies in cases where the processing of data is permitted by law.
2. Legal basis for the processing of personal data
Art. 5 para. 1 GDPR contains the basic rules of data processing which must be observed when processing personal data and which characterize the GDPR. One of these principles is the "principle of lawfulness" pursuant to Art. 5 para. 1 lit. a GDPR, which is set out in Art. 6 GDPR. Art. 6 para. 1 GDPR stipulates that processing is only lawful if at least one of the conditions exhaustively listed therein is met. In addition, EC 40 states that for processing to be lawful, either consent must be given or another legal basis for the processing must exist.
Art. 5 para. 1 lit. a GDPR thus implements Art. 8 para. 2 sentence 1 CFR (European Charter of Fundamental Rights), which guarantees the data subject that their personal data may only be processed with their consent or on another legitimate basis regulated by law.
3. Data erasure and storage duration
Your personal data will be deleted or blocked as soon as the purpose of storage no longer applies.
III. Provision of the website and creation of log files (log files)
1. Description and scope of data processing
Each time our website is accessed, our system automatically collects data and information from the computer system of the accessing computer; the following data is logged
Information about the browser type and the version used
Information about the browser type and version used
- the user's operating system
- the IP address of the user
- on the delivery servers for 90 days. This serves to ensure operation and to protect against attacks (e.g. DDOS).
- Date and time of access, including URL accessed, HTTP method used and status code returned, as well as the transmission volume
- HTTP request header Origin transmitted by the client
- Websites from which the user's system accesses our website
- is stored as referrer.
2. Legal basis for data processing
The legal basis for the temporary storage of data and log files is Art. 6 para. 1 lit. e GDPR.
3. Purpose of the data processing
The temporary storage of the IP address by the system is necessary to enable the website to be delivered to the user's computer. For this purpose, the user's IP address must remain stored for the duration of the session.
The IP address is stored on the delivery servers for 90 days. This serves to ensure operation and to protect against attacks (e.g. DDOS).
4. Duration of storage
The log files are stored centrally and deleted after 90 days.
5. Possibility of objection and removal
The collection of data for the provision of the website and the storage of data in log files is absolutely necessary for the operation of the website. Consequently, the user has no option to object.
IV. Use of cookies
a) Description and scope of data processing
We use cookies to enable you to make optimum use of our website. Cookies necessary for the operation of the site are set.
In detail, these are the following cookies:
CM_SESSIONID - CoreMedia session cookie: This cookie is a session identifier and is used by the server to assign the user to the correct session after reloading the page. Even if the page is opened in another tab, the server can assign the session number. This is a standard cookie of the CoreMedia product.
cart - Shopping cart cookie: The cookie stores a session number, the selected publications and the quantity requested by the user. The cookie is necessary to deliver the shopping cart to a specific visitor after the page has been reloaded. The cookie is only set when an item is added to the shopping cart.
cookie-allow-necessary - A cookie to save the setting "Only necessary cookies". Default setting when visiting the site.
cookie-banner - Cookie to hide the cookie banner. Prevents the banner from being displayed again after loading the page.
cookie-allow-tracking - Cookie stores the user's interaction with the banner.
mtm_consent_removed - The cookie "mtm consent removed" is activated when the page is initially accessed, as the user has not consented to tracking by the statistics tool Matomo when accessing the website. The cookie contains the information that tracking is not permitted.
mtm_consent - If the "Statistics" checkbox is selected in the cookie banner and the selection is confirmed, the "mtm_consent_removed" cookie is removed and replaced by the "mtm_consent" cookie. This cookie contains the information that the user has consented to tracking. As soon as users deselect the statistics cookie, the "mtm_consent" cookie is replaced by "mtm_consent_removed".
INGRESSCOOKIE - Cookie for storing information in forms, for example in the contact form or when changes are made in the shopping cart.
enodia - The cookie is used for DDoS defense and thus the security of the website.
SERVERID - This cookie enables the website to load faster.
b) Legal basis for data processing
The legal basis for the processing of personal data using cookies is Art. 6 para. 1 lit. e GDPR or Art. 6 para. 1 lit. a GDPR for consent-related cookies.
c) Purpose of the data processing
Technically necessary cookies enable optimal use of the website.
The user data collected by technically necessary cookies is not used to create user profiles.
d) Duration of storage, right of objection and removal
Cookies are stored on the user's computer and transmitted by it to our website. As a user, you therefore have full control over the use of cookies. You can deactivate or restrict the transmission of cookies by changing the settings in your Internet browser. Cookies that have already been saved can be deleted at any time. This can also be done automatically. Matomo is deactivated when you visit our website. Your usage behavior is only recorded anonymously if you actively consent to this.
V. Contact form, e-mail contact, postal and telephone contact
1. Description and scope of data processing
There is a contact form on our website that can be used to contact us electronically. If you use one of these options, the data entered in the input mask will be transmitted to us and stored. These data are
Subject
Your message
Salutation, first name and surname, e-mail address
The following data is also stored when the message is sent:
1. the user's IP address
2. date and time of registration
Your consent is obtained for the processing of the data as part of the sending process and reference is made to this privacy policy.
Alternatively, you can contact us via the e-mail address provided or by post. In this case, the user's personal data transmitted with the e-mail and by post will be stored.
When calling the telephone number +49 (0)6421 / 282 3127, the telephone number is temporarily stored if the telephone number is transmitted automatically or if the user is asked to enter it.
The data will not be passed on to third parties in this context. The data is used exclusively for processing the conversation.
2. Legal basis for data processing
The legal basis for the processing of data transmitted in the course of sending an e-mail is Art. 6 para. 1 lit. e GDPR. If the e-mail contact is aimed at the conclusion of a contract, the additional legal basis for the processing is Art. 6 para. 1 lit. b GDPR.
3. Purpose of the data processing
The processing of the personal data from the input mask serves us solely to process the contact. The other personal data processed during the sending process serves to prevent misuse of the contact form and to ensure the security of our information technology systems.
The purpose of storing the telephone number is to enable a requested callback and to prevent misuse of the service. No further personal data is collected.
4. Duration of storage
The data will be deleted as soon as it is no longer required to achieve the purpose for which it was collected. A retention period of up to three years applies to personal data from the input screen of the contact form and data sent by email or post.
The additional personal data collected during the sending process will be deleted after a period of seven days at the latest.
The telephone numbers transmitted during a call will be deleted after one month at the latest.
5. Right of objection and removal
Users have the right to withdraw their consent to the processing of personal data at any time. If the user contacts us by e-mail, for example, they can object to the storage of their personal data at any time. In such a case, the conversation cannot be continued.
All personal data stored in the course of contacting us will be deleted in this case.
VI. Information about your rights
If your personal data is processed, you are a data subject within the meaning of the GDPR and you have the following rights vis-à-vis the controller:
1. Right to information - Art. 15 GDPR
You can request confirmation from us as the controller as to whether personal data concerning you is being processed by us.
If such processing is taking place, you can request the following information from the controller
(1) the purposes for which the personal data are processed;
(2) the categories of personal data being processed
(3) the recipients or categories of recipients to whom the personal data concerning you have been or will be disclosed
(4) the envisaged period for which the personal data concerning you will be stored, or, if specific information on this is not possible, the criteria used to determine that period
(5) the existence of a right to rectification or erasure of personal data concerning you, a right to restriction of processing by the controller or a right to object to such processing
(6) the existence of a right to lodge a complaint with a supervisory authority
(7) all available information about the origin of the data if the personal data is not collected from the data subject
(8) the existence of automated decision-making, including profiling, referred to in Art. 22 (1) and (4) GDPR and, at least in those cases, meaningful information about the logic involved, as well as the significance and the envisaged consequences of such processing for the data subject.
You have the right to request information as to whether the personal data concerning you is transferred to a third country or to an international organization. In this context, you may request to be informed of the appropriate safeguards pursuant to Art. 46 GDPR in connection with the transfer. Reference is also made to the right to data portability, Art. 20 GDPR.
2. Right to rectification - Art. 16 GDPR
You have a right to rectification and/or completion vis-à-vis us as the controller if the processed personal data concerning you is incorrect or incomplete. The controller must carry out the rectification without undue delay.
3. Right to restriction of processing - Art. 18 GDPR
You may request the restriction of the processing of personal data concerning you under the following conditions
(1) if you contest the accuracy of the personal data concerning you for a period enabling the controller to verify the accuracy of the personal data;
(2) the processing is unlawful and you oppose the erasure of the personal data and request the restriction of their use instead
(3) the controller no longer needs the personal data for the purposes of the processing, but they are required by you for the establishment, exercise or defense of legal claims; or
(4) if you have objected to processing pursuant to Art. 21 (1) GDPR pending the verification whether the legitimate grounds of the controller override your grounds.
If the processing of personal data concerning you has been restricted, this data - apart from its storage - may only be processed with your consent or for the establishment, exercise or defense of legal claims or for the protection of the rights of another natural or legal person or for reasons of important public interest of the Union or of a Member State.
If the restriction of processing has been restricted in accordance with the above conditions, you will be informed by the controller before the restriction is lifted.
4. Right to erasure - Art. 17 GDPR
a) Obligation to erasure
You have the right to obtain from the controller the erasure of personal data concerning you without undue delay and the controller shall have the obligation to erase personal data without undue delay where one of the following grounds applies:
(1) The personal data concerning you are no longer necessary for the purposes for which they were collected or otherwise processed.
(2) You revoke your consent on which the processing was based pursuant to Art. 6 para. 1 lit. a or Art. 9 para. 2 lit. a GDPR and there is no other legal basis for the processing.
(3) You object to the processing pursuant to Art. 21 (1) GDPR and there are no overriding legitimate grounds for the processing, or you object to the processing pursuant to Art. 21 (2) GDPR.
(4) The personal data concerning you has been processed unlawfully.
(5) The deletion of personal data concerning you is necessary to fulfill a legal obligation under Union law or the law of the Member States to which the controller is subject.
(6) The personal data concerning you have been collected in relation to the offer of information society services referred to in Art. 8 (1) GDPR.
b) Information to third parties
Where the controller has made the personal data concerning you public and is obliged pursuant to Art. 17 (1) GDPR to erase the personal data, the controller, taking account of available technology and the cost of implementation, shall take reasonable steps, including technical measures, to inform controllers which are processing the personal data that you as the data subject have requested the erasure by such controllers of any links to, or copy or replication of, those personal data.
c) Exceptions
The right to erasure does not apply if the processing is necessary
(1) to exercise the right to freedom of expression and information
(2) for compliance with a legal obligation which requires processing by Union or Member State law to which the controller is subject or for the performance of a task carried out in the public interest or in the exercise of official authority vested in the controller
(3) for reasons of public interest in the area of public health pursuant to Art. 9 para. 2 lit. h and i and Art. 9 para. 3 GDPR;
(4) for archiving purposes in the public interest, scientific or historical research purposes or statistical purposes in accordance with Art. 89 para. 1 GDPR, insofar as the right referred to in section a) is likely to render impossible or seriously impair the achievement of the objectives of that processing, or
(5) for the establishment, exercise or defense of legal claims.
5. Right to information - Art. 19 GDPR
If you have asserted the right to rectification, erasure or restriction of processing against the controller, the controller is obliged to notify all recipients to whom the personal data concerning you have been disclosed of this rectification or erasure of the data or restriction of processing, unless this proves impossible or involves a disproportionate effort.
You have the right vis-à-vis the controller to be informed about these recipients.
The right to data portability does not apply to the processing of personal data necessary for the performance of a task carried out in the public interest or in the exercise of official authority vested in the controller.
6. Right to data portability - Art. 20 GDPR
You have the right to receive the personal data concerning you from the controller in a commonly used, machine-readable format and, where applicable, to transmit those data to another controller, provided that
1. the processing is based on consent pursuant to Article 6(1)(a) GDPR or Article 9(2)(a) GDPR or on a contract pursuant to Article 6(1)(b) GDPR and
2. the processing is carried out by automated means.
In exercising your right to data portability pursuant to paragraph 1, you have the right to have the personal data transmitted directly from us to another controller, where technically feasible.
7. Right to object - Art. 21 GDPR
You have the right to object, on grounds relating to your particular situation, at any time to processing of personal data concerning you which is based on point (e) of Article 6(1) GDPR.
The controller will no longer process the personal data concerning you unless the controller demonstrates compelling legitimate grounds for the processing which override your interests, rights and freedoms or for the establishment, exercise or defense of legal claims.
8. Right to revoke the declaration of consent under data protection law - Art. 7 para. 3 GDPR
You have the right to withdraw your declaration of consent under data protection law at any time. The withdrawal of consent shall not affect the lawfulness of processing based on consent before its withdrawal.
Status: August 2025
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