Law of Obligations


In the first part of the semester, students will be familiarized with the general legal framwork of the obligation and its dogmatic construction, making known the legal instruments at their disposal and developing the capacity for legal argumentation and resolution of practical problems.
The second part of the semester is aimed at developing the study of the sources of obligations, excluding those that in due course will be studied in the disciplines of Contract Law and Civil Liability.
At the end of the semester, students should be able to select the legally relevant facts from a text, to identify the legal provisions that may contribute to the solution of such problems, to interpret them, extracting the applicable principles and rules, to enunciate the main dogmatic constructions associated with them and take a position based on them, and, finally, to present, in a clear and ordered manner, the solutions they propose for such problems, justifying the various stages of their reasoning. 

General characterization





Responsible teacher

Margarida Lima Rego, Joana Farrajota


Weekly - 6

Total - 72

Teaching language



Teoria Geral do Direito Privado.





1. Manuais atuais

Cordeiro, A. Menezes - Tratado de direito civil, vol. VI, 2.ª ed., Almedina 2012; vol. VII, Almedina 2010; vol. VIII, Almedina 2010; vol. IX, 3.ª ed., Almedina 2017; vol. X, Almedina 2015.

Costa, M. J. de Almeida - Direito das obrigações, 12.ª edição, Almedina 2010.

Júnior, E. Santos - Direito das obrigações I. Sinopse explicativa e ilustrativa, 3.ª ed., AAFDL 2014.

Leitão, L. Menezes - Direito das obrigações, vol. I, 15.ª ed., Almedina 2018; vol. II, 12.ª ed., Almedina 2018.

Martinez, P. Romano - Direito das obrigações. Programa 2017/2018. Apontamentos, 5.ª edição, AAFDL 2017.


2. Obras de referência

Andrade, Manuel de - Teoria geral das obrigações, 3.ª ed., Almedina 1966.

Faria, J. Ribeiro de - Direito das obrigações, vol. I, Almedina 1987, vol. II, Almedina 1990.

Fernandes, L. Carvalho/ Proença, J. Brandão (coord.) - Comentário ao Código Civil. Parte Geral, UCP 2014.

Jorge, F. Pessoa - Direito das obrigações, vols. I e II, AAFDL 1975-76.

Lima, F. Pires de/ Varela, J. M. Antunes - Código Civil anotado, vol. I, 4.ª edição, Coimbra 1987, vol. II, 4.ª ed., Coimbra 1997.

Prata, Ana (coord.) - Código Civil anotado, vols. I e II, Almedina 2017.

Telles, I. Galvão - Direito das obrigações, 7.ª ed., Coimbra 1997.

Varela, J. M. Antunes - Das obrigações em geral, vol. I, 10.ª ed., Almedina 2000, e vol. II, 7.ª ed., Almedina 1997.







Teaching method

The classes, all theoretical and practical, are based on a permanent dialogue between the professor and the student. Whenever their nature allows, the various subjects included in the program will be analyzed based on practical exercises that describe life situations, which students are called to dissect, acquiring and perfecting in this practice the legal instruments at their disposal and developing the capacity for argumentation and legal basis and problem solving. The professor will conduct the classes, and will be responsible for framing and complementing the discussions.

Evaluation method

The evaluation is made by final exam with the duration of three hours. At the beginning of the semester students may choose to attend classes on a continuous assessment basis, in which case the final grade will result from a weighting between the grade in the final exam and the work to be done during the semester. This weighting will give an identical weighting to both marks, with a maximum increase of three values in the final mark in relation to the mark obtained in the final exam. The weighting of the work to be carried out during the semester cannot result in prejudice to the students, whose final grade will never be lower than that obtained in the final exam.

Subject matter

The obligation

1. introduction

2. Compliance and noncompliance with an obligation

3. Other grounds for extinguishing an obligation

4. Transmission of obligations

5. Plural relationships

6. Other special rules

7. Guarantee of obligations

8. Conclusion

Sources of obligations

1. The question of "sources of obligations"
2. Unjust enrichment
3. Negotiorum gestio
4. The obligation to eliminate an injury
5. Open problems



Programs where the course is taught: