Meaning?

Hi,would you please tell me what is the meaning of outfit in the following text:

The man on the other end was someone she had never met, would indeed never have reason to, and she did not know his real name. When she paid him, always in cash, she sent the money inside a thin paperback in a little package through the mail to a post office box in Camden,Maine, to a vague outfit called KLData.

Thanks5