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Service of documents. 
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26.—Where a copy of an order, petition or other document is required by this Act to be given to a person, it shall be addressed to him and shall be given to him in some one of the following ways: 
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(a) by delivering it to him; 
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(b) by leaving it at the address at which he ordinarily resides or, in a case in which an address for service has been furnished, at that address; 
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(c) by sending it by post in a prepaid registered letter addressed to him at the address at which he ordinarily resides, or in a case in which an address for service has been furnished, at that address. 
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