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Discover Ludwig"Certified by" is a correct and usable phrase in written English
You can use it to refer to something that has been confirmed by a professional or a recognised expert. For example, "These documents have been certified by a qualified accountant."
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Certified by your doctor or midwife, leave and benefit are calculated from this point.
Companies will be obliged to tell customers if the seals they use are certified by their own companies as opposed to being certified by a third party.
All movies had to be certified by that board.
All such laboratories must be certified by the state.
This should then be certified by a third party audit".
The results still need to be certified, by someone.
The results are to be certified by Sunday.
The course has been certified by California, Tennessee and Pennsylvania.
That I'd been certified by the Wine & Spirit Education Trust?
Existing systems will have to be certified by engineers.
Many are certified by the American Meteorological Society.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com