The present investigation deals with a relevant topic, such as the importance of documentary evidence in the presentation of civil proceedings. With the study carried out, which is based on two fundamental elements, namely: direct observation and interviews with personnel who are aware of the reality under study, it is possible to identify the errors made by the trial lawyers when incorporating the documentary evidence into civil processes, establishing that, with respect to public documents, they are presented in simple copies, while private documents are not asked for their respective recognition of content and signature. In addition, it has been indicated that documentary evidence is important and fundamental, being an indispensable and unique means in certain types of processes, since with it the claim of the plaintiff would be proven in the cases in which this means of evidence is required, and that , if its presentation is made without the formalities provided by law, the result will be that the Judge cannot give the respective probative value and therefore will not be able to recognize the claim of the plaintiff.
