how lucky am i

[noggythenog]

This is like one of those what would you do if you found a parcel of drugs on the beach......or a briefcase of money.

you get nothing for nothing in this life....tempting as is...some poor foccer might get shat on for this..their fault completely.....but do you need the stuff...ye you could get a few quid but will you feel just a little guilty...if you wont then go for it.....if it'll niggle you then be honest and own up.
Perhaps ask them to check their records of what you ordered and what they sent......if they cant notice any discrepancy then foc them you've met half way.