Baha'is may receive contributions from non-Baha'is

"Your letter ... about accepting donations from non-Bahá'ís for the maintenance of tutorial schools has been received, and we have been asked to reply as follows.

"Bahá'ís may receive contributions from non-Bahá'ís for charitable activities whose beneficiaries are non-Bahá'ís as well. However, it is very important to ensure that the acceptance of funds from any source should in no way affect the school's direction and policy."

(From a letter written on behalf of the Universal House of Justice to the National Spiritual Assembly of India, January 13, 1978)

http://bahai-library.com/hornby_lights_guidance_2.html&chapter=4#n1890