For example, if you bring a laptop made in Japan back to Canada, but you can't prove that you owned it before you left Canada, you may have to pay customs duties and government taxes for it. Therefore, valuables must be accompanied by invoices, receipts, insurance policies and jewelry appraisal certificates to prove that the items were not purchased overseas. CBSA has free valuables identification and registration service. Before you leave Canada, you can ask CBSA personnel to register the items with serial numbers or other special marks, so that when you return to Canada, you can provide a registration card and the items can enter the country duty-free without worrying.