thanks for the replies and suggestions.
i noticed that in every MR from the different sites,
a witness is required. does that mean the witness
has to be present during the shootings? or can it
be someone who signs on it but not being in the
shootings?
also, after signing the MR, the model may not sell
the photos? but can only use it for his/her personal
port folio?
i hope my english is clear here

thanks pixart for the kind help!
appreciate it!