The distinction between honesty (honestum) and good faith (bona fides) finds in the matter of usucapion a special significance that leads to the acquisition of the property right or its dismantling. The analysis of the concept takes place on the basis of the contemporary legislation of Romania and the Republic of Moldova, but it takes the vision and the experience of the French and Canadian authors, all in the context of access to the legal systems of France and Canada. The essence of those presented we find it at Philippe Malaurie (MALAURIE, 1997), who said that “possession (...) occupies a place comparable to that of state ownership in the matter of filiation: the law tends to face when the latter is significant.”