The process of documentation Documentation is a necessary process in translation, and it involves the search for parallel texts, as well as the advice of natives and/or professionals, and the use, if possible, of translation memories.When we talk about documentation, we can distinguish between textual and the lexical levels: -- The TEXTUAL level includes multilingual texts (including texts in the SL) and parallel texts in the TL (both authentic and translated ones).A UNIVERSITY HANDBOOK ON TERMINOLOGY AND SPECIALIZED TRANSLATION -- The LEXICAL level includes multilingual, bilingual or monolingual (with or without definitions) dictionaries, glossaries, specialized terminological databases, etc.Nevertheless, a great amount of the information that translators need cannot be found in books or other edited works but in other types of documents, and when we deal with specialized languages, sometimes, translators may even need the advice of oral informants (native speakers, specialists in the field or other translators).-- Corpus: reference works (lexicographic, terminographic, etc.) are more reliable, useful, and trustworthy if they come from real and authentic corpora.-- Specificity: dealing with specialized languages, this criterion is of utmost importance.This level also includes legislation, leaflets, manuals, and human informants.