(a) If the schleah was robbed or lost the money we collect it again.Say it
was $100 what will they do if only $50 are found do we collect quarters
from evryone (didnt give a machtzis)collect from half(which half?)collect
machtzis from all (put half in the wallpaper slot on purpose?)?
(b) We collect $100 a second time - is it a tashlumin for the first time or a new
chiyuv?Nafka minah if he became bar mitzva in between,before estate $ etc regarding
paying the kalbon?
(c) Does a person who missed giving give later ie he becomes bar mitva after
pesach?
(d)Does a person who dies after pesach also have the machtzis removed or
since it was already used (possibly) we dont remove it?
(a) Divide the amount equally among all those who gave (as by Shutfus).
(b) A Tashlum. The Chiyuv is only before the first of Nissan.
(c) Same as above (b).
(d) No, it is removed only if he died before his money reached the Lishkah and before the Terumah (see Meiri).
Be well,
Mordecai Kornfeld
With regard to question (a), in the interim I asked Rav Belsky. He said you cannot collect because hamotzi meychaveyro will come to play.