What gets a NSB import rejected
01The phone number lives with the shipping address, not at the top level.
02The expiry year is two digits.
03The billing block is only read when the same-as-shipping flag is off.
CSV file
One row per profile, with a header row the bot checks before importing.
UK details
Phones are eleven digits starting 07 and postcodes keep their space. Both get checked before conversion.
Card data stays private
The converter never keeps a copy of your file. The converted version comes straight back to you.