yes. It's a formal way to say it.
It would be grammatically correct to say: Please find the attached.... it does not make much sense to write both kindly and please since both almost mean the same.
attached please find the file ICT departmental meeting slide for your reference
It should be "Please find attached my husband's insurance card".
I would suggest "Please see attached for your reference" or "Please see attached for more information".
Purchase order are attached
Yes, the phrase "please see attached letter" is grammatically correct. However, it might be more formal to say "please find attached the letter" or "I have attached the letter for your reference."
When you say "please find the attached file" no need to mention "below" because the recipient will not find the attached document below or within the body of the email.
No, the correct way to phrase this would be: "Please find attached a copy of your bachelor's certificate."
When you say "please find the attached file" no need to mention "below" because the recipient will not find the attached document below or within the body of the email.
It would be better to say "Please find the attached document as requested". The "you" isn't really necessary.
No, the phrase "kindly find attached for your signature" is not grammatically correct. In order to make this sentence correct, you will need to state what is attached, such as "kindly find the contract attached for your signature."
Yes, or you could say "Please see attached file" or "I've attached a file for you."