Courier bill of entry with 6 digits number not valid in gst

Donati (Self occupation) (76 Points)

18 December 2017  

Hello there,

This is regarding claiming Input Tax Credit on Import of Goods. 

I've received a Bill of Enry from the Courier company (Aramex & Fedex). Both the BOE has 6 digit & 5 digit numbers respectively, however both the numbers are termed as INVALID  in GST website under GSTR-2. As per the website the BOE number has to be in 7 digits. 

And as per the courier company, it was a manually filed Bill of Entry. I don't know what it meant.

How can I get the actual BILL OF ENTRY number. 

Please help.