puzzled me
as well, at first. I hadn't heard of a 'tbe' letter either
... and then realised the person - in whose post #2 you'd spotted this - had inadvertently typed the characters tbe instead of the in his reference to the Company Letter needed.
So don't worry ...... a simple, straightforward letter from your current employer will, as Graham has indicated, prove sufficient to confirm your wages for visa purposes.
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