You have to comply with both. When a translator makes a translation of any document, he will provide you with the following documents:
1. The copy of the translation
2. The original document which was translated; and
3. An affidavit declaring that the translation was done by him.
This is a universal norm, followed by all translators. Some translators, instead of giving an affidavit, will certify by making a statement on the translation and signing it. This is usually acceptable from translators who are in Canada on the panel of IRCC or recognized by the province or the federal government.
For all other translators in foreign countries, you will have to use the set of 3 as listed above.