26 U.S.C. § 7001

1. (a)All persons undertaking as a matter of business or for profit the collection of foreign payments of interest or dividends by means of coupons, checks, or bills of exchange shall obtain a license from the Secretary and shall be subject to such regulations enabling the Government to obtain the information required under subtitle A (relating to income taxes) as the Secretary shall prescribe.
2. (b)For penalty for failure to obtain the license provided for in this section, see section 7231.