If you are looking for a "useful paper" in the sense of a financial instrument instead of physical metal, you might be interested in :
This is a standard anti-money laundering report and does not mean the purchase is illegal. buy a pound of gold
: Documents for a bank transfer, wire, or personal check are recommended to avoid triggering cash-specific reporting requirements. IRS Reporting (Dealer's Paperwork) If you are looking for a "useful paper"