In my understanding:
coins are lawful money. this is why you get an automatic 1k deduction - or you used to be able to get that - I do not claim anymore deductions as it is not necessary.
Also regarding lawful money - IF you make your CLAIM or DEMAND, then you have fulfilled the Law! What is given back to you matters not - BECAUSE this comports with 31USC5115 - read the footnotes [revisions].
Shalom,
Michael Joseph