My attention was drawn to this past auction this morning by Andy at Bowie Autograph.com
https://davidbowieautograph.com/blog/f/another-forgery---another-%C...
A little intrigued, I googled Jordi Tarda and established he was a successful DJ and music journalist. Whilst his credentials of meeting several stars are not under question (there are plenty of pictures), some items being offered by the estate are VERY questionable.
The estate recently auctioned up to 15,000 of his records, some of which are signed, here are a couple more signed "examples" from his collection (note the 60's sig style on Miss You below):

An even worse Bowie forgery than the Aladdin Sane one in the Bowie Autograph article:

Whilst I am not suggesting these items were done by Mr Tardi's hand, this type of auction and hype (because of his connections) continue to underline the need to get better 3rd party evaluation before buying!