A. Rav Chisda holds yes.
Raboh - no.
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Q. What is the basic definition of a Shliach ?
A. One who was sent to represent someone & all that he does is valid. Words alone are sufficient , a Kinyan or witnesess are not required. Rambam
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Q. Where is there a proof that one may rejoice upon receiving a substantial sum of money ?
A. See Rashi 104b , 17 lines from the top.
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Q. Is it permitted to also go out of your way to get the money ?
A. Yes. See Gemara
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Q. What is the common denominator between
Stolen
Deception
A deposit for safekeeping
& something he found ?
A. The Torah refers to all 4 in one verse 5:23 , as to the need to return them.
Now may be a good time for a gem of Torah study.
www.GemsofTorah.com