Serfdom in Wallachia and Moldavia was common between 15th and 18th centuries, replacing the autonomous communities named "obște" that were common particularly before the founding of the medieval states of Wallachia and Moldavia. While initially the serfs were allowed to change the estate on which they lived (sometimes in exchange for a sum of money paid to the boyar), gradually some restrictions were set up, making the serfs
A generic name for serfs was șerb (from Latin servus, "slave", cognate with serf), but they also had some regional names: vecini in Moldavia (in today's language meaning "neighbour") and rumâni in Wallachia. The latter was actually the native ethnonym of Romanians; Neagu Djuvara explains it by the fact that in the Middle Ages, the landlords may have been foreign, Slavic or Cuman.
Originally, Romanians lived in autonomous communities called "obște", which mixed private and common ownership, employing an open field system. With time, in the 14th and 15th centuries, the private ownership of land gained ground, leading to differences within the obște, towards a stratification of the members of the community.
Some villages were given by the hospodar to boyars, military servants and monasteries, replacing the common ownership with the ownership of a feudal lord. Other villages were taken over by force by military leaders without the involvement of the Hospodar.
In 15th century Moldavia, the organization of the villages from free obște (being led by a cneaz) continued to exist in parallel with the feudal order.
The life and status of serfs gradually worsen during the 18th century. There were cases in which serfs were sold individually by their landlords, breaking them from the land which they worked or even their family. The peasants complained to the Hospodar that they no longer were treated like serfs, but more like slaves.
Some serfs fled their estates to other ones far enough, so that their trace could be lost. As there was always a need for more manpower, the new landlord usually accepted the stray serfs without questioning their origin. In the aftermath of the Austro-Russian–Turkish War (1735–39), the harsh conditions of the serfs led to depopulation of entire villages or even regions, as serfs fled towards other places, often in the mountains or even in Transylvania. The landlords saw that without a workforce, they could lose everything, so some released their serfs, allowing them to work their land as before, but as free peasants in exchange of a rent. Peasants who had fled were enticed to return by being given special contracts, as were Transylvanians, who were encouraged to settle.