Mini Becky Serial Number?

[Marilla]

Hi YSL lovers
I bought a preloved mini Becky today which came with an Entrupy certificate. The certificate has the serial number on it but I cannot find it ANYWHERE in the bag! Does anyone know where it’s located? I’ve googled and googled but can’t find any info. I don’t trust Entrupy authentication so would like to get another opinion - but need to find the code first!
Help very much appreciated!

 

[Marilla]

Found the code! Also realised this is actually a chain wallet not a mini! In case anyone else is looking in future, the location is at the bottom of the back section of the bag