The meaning of this sentence is: our company can only provide letters in attachment format, other authorization letters cannot be provided, please confirm with the customer whether it is possible.
This sentence means: Division I can only provide attachment form of correspondence, other authorizations can not be provided, please check with the customer whether it can.
Our company can only provide the letter in the form of attachment, other power of attorney can not be provided, please confirm with the customer whether it is OK.<br>