Bank sent form CRS / FATCA on my child's saving account is this a regular process?

My child has to complete a form for her tax residency. is this something applicable for a minor? what are the reason the bank is asking for this. they have all the information of residency which is only in UK. Maybe my tax residency is not clear and they are asking for my child account where there were movements, as I use her account to move money around between her accounts. which I am the trustee. the information to provide is very sensitive and I am just nervous around it being shared to third parties. Why would HRMC need my child's declaration of residency. When I called the bank they couldn't tell me, they mentioned it was more related to the adult tax residency. Not sure if I understand well that requirement, does it mean the bank will send my child's details to HRMC? also considering that that is not necessary given that non foreign tax residency apply. it does not apply to me, but they have not asked me. which is weird. I would appreciate information explaining this. Many thanks

Hi,
Banks will sometimes require tax residency forms for minors to report where a customer is tax resident, especially if there are significant transactions. This is part of compliance with international tax regulations which is what the CRS/FATCA form is for. The bank may be asking for this information to ensure they are compliant with these regulations. For further information on this you may with to speak to your bank again to see if they can help further. 
Thank you.