A sender has the right to claim compensation regarding damaged or missing postal items but there are definite procedures for the same.
In cases where the addressee receives a mail in broken or damaged condition, the addressee must keep it in the same condition and declare the loss to the local post office.
In cases where the postal items are not delivered or there are chances of theft, as a first step, request for Japan post tracking or submit a search request and wait for an answer. If a compensation claim is justified in the case, one can proceed to fill the compensation claim application that is drafted by the branch that has been assigned by the postal company.