Margin Scheme - VAT cannot be reclaimed, not documented

I sell second hand goods under the Margin Scheme for Second Hand Goods and issue a receipt without a VAT figure and with the text stating "Margin Scheme for Second Hand Goods". One of my customers has queried and I want to point them to the documentation that states they cannot reclaim VAT. This is not explicit in https://www.gov.uk/vat-margin-schemes, can you point me elsewhere please that makes this clear.

https://www.gov.uk/vat-margin-schemes/keeping-records (you'll need to read through to the section under "selling").

Hi secondtrader2,
Please see the guidance below:
VAT Margin Schemes
Thank you.

Thanks, so according to Article 4 if somebody buys an Office Chair from me that I have sold to them under the Margin Scheme for Second Hand Goods, then they can reclaim the VAT I have included in the price, as Office Chairs are not included in the items listed in paragraph (2). Please confirm I have understood this correctly. 2) The goods referred to in paragraph (1) above are— (a)works of art, antiques and collectors' pieces; (b)used motor cycles; (c)used caravans; (d)used boats and outboard motors; (e)used electronic organs; (f)used aircraft; (g)used firearms.

Hi.
The customer would not be able to recover the VAT charged in your price when selling the item under the margin scheme.
The margin scheme can be sold for any second hand goods with the exception of :
any item you bought for which you were charged VAT
precious metals
investment gold
precious stones.
So if a customer purchases a chair on the margin scheme then that customer can also sell the chair on the margin scheme to his customer but will not be allowed to recover the VAT within the price which you have charged.
Please see the guidance at:
VAT margin schemes: Overview
Thank you