Posting or sharing certification on social online with ID number

Hi,

I noticed some folks share their certificates online in LinkedIn, etc, with ID number and some are covered in, eg. ISC2, Cisco, etc

I understand its for verification and the ID number seems private or just an index key.

Compare to Find a Nurse in Ontario, you can easily just search using the full name of a nurse and it will result with their registry number.

Seems safe but, just need to know your thoughts or best practice.

\*Update: …

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