Depending on your organisation structure, and the powers within it, letters of authorisation may be required. This is done in one of the two ways below.
One letter with multiple signatories present
If multiple authorised signatories are mentioned on one letter, it must be submitted by one of the authorised signatories.
Multiple letters, but each letter is for a specific authorised signatory
If there are multiple letters in the account, they will all need to be uploaded. Make sure that the correct person submits the right letter. This person is mentioned first on the letter.