Thanks for your question.
Are you acting in a professional capacity? If not, the scanned copies will suffice.
You could ask for certified copies, that way a professional has had to see the tenant and the passport/ID.
Any further questions or queries?
Happy to help further.
I manage some properties for my parents. Can I accept a photo of the passport / scanned copies?
You can. If you are acting outside of a professional context then photocopies/scans are acceptable.
When you refer to professional context, do you mean a business or agency?
For yor purposes a scanned copy / photo copy is fine.
It is only professionals, lawyer/accountants etc, that has more stringent requirements.