Bank requesting a W-9

Barclays has asked me to fill in paperwork regarding tax residency and citizenship info along with an W-9 for my son's child savings account.  I am in control of the account until he reaches the age required for transferring into his name as an adult savings account.  The letter calls me a trustee.  Barclays assures me it is not a trust and that it is not a joint account. I'm not sure what the US would make of it.

The paperwork just asks for child's name, address, birthdate and TIN.  The W-9 (also to be in child's name) looked straightforward until I realised it's geared for a business.  Any thoughts on what to check for line 3?  The instructions don't explain the box for Other despite saying "see instructions".  I've left lines 2 and 4 blank (and 7 as it's optional).

Has anyone else been asked to complete W-9 or any other paperwork? I've yet to be asked for anything and I have several grown-up accounts with Barclays.  When I called in for advice, the FATCA team pointed me towards their website and said I could download and send in to them a self certification form and a W-9.  They were unable to confirm from their records that I am UK/US citizen as their system only allows one nationality to be entered in.

On page 3, looking at the chart, it clearly states that if the person on line 1 is an individual, then you check the first box (Individual/sole proprietor or single-member LLC).

Don't over-think this form.

Thanks for your reply Vadio.

Well of course...that's from W-9 rev Nov 2017!  Barclays provides a download link to the 2014 rev which does not have the clear to understand chart.  Grrrr. I should have checked myself for the latest on the IRS website.

Remember naturally to make sure your son has no PFICs in his savings and that his account(s) are reported in the signature authority section on your own annual FBAR...

Yes, will do.  Thanks guya!