Canada. Post Office Department, Canadian Postal Guide
“ It should be clearly understood that the post office is not responsible for the safe delivery of a registered letter or parcel. The registration simply makes its transmission more secure, by rendering it practicable to trace it, when passing from one place to another in Canada, from its receipt to its delivery; and when addressed from any place in Canada to any place in the United States, the United Kingdom, or parts abroad, if not to its delivery, at least to the frontier or port of despatch. ”
