see this article in the full MAL
(1) Unless otherwise agreed by the parties:
(a) any written communication is deemed to have been received if it is delivered to the addressee personally or if it is delivered at his place of business, habitual residence or mailing address; if none of these can be found after making a reasonable inquiry, a written communication is deemed to have been received if it is sent to the addressee's last-known place of business, habitual residence or mailing address by registered letter or any other means which provides a record of the attempt to deliver it;
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SEE ALSO THE SEPARATE ENTRIES FOR THE OTHER SECTIONS OF THIS ARTICLE.