The following articles must be registered, or insured :-
Coin, banknotes, currency notes, securities of any kind payable to bearer, travelers’ cheques, platinum, gold or silver (whether manufactured or not), precious stones, jewels, or other valuable articles.
They may be sent only to destinations accepting them, and in the manner prescribed.
Where the total value exceed $2,500 such articles must be sent:-
For details, please refer to the Appendix: Overseas Post - Service Information by Destination of Post Office Guide.