they report to the noble
Your question is not entirely correct in its premise; a serf is not a slave and does not have an owner. A serf is a subject of a land owner whom the serf would address as lord.
they where like peasants but lived in the castle to help royalty
A serf would ultimately report to the ruler of the nation, below that it would be any of the ruler's appointed leaders of the county the serf lived in, as well as tax collectors. They were controlled by anyone that could show a level of authority from the King or Queen.
Serf is another word for slave so they were owned by the nobility.
serf
to whom is a report disseminated to and how is it done
whom did the viceroy send to check onCabeza de Vaca's report?
What kind of eligibility are you asking about and report to whom?
no clue some king
in Illinois who is required by law to report infectious diseases and to whom do they report
Sarge.
The police.