Only an individual is permitted to collect contributions from others and transmit them to the intended recipient.  Political committees, businesses, unions, and organizations (or people representing them) are prohibited from collecting contributions from various sources (commonly known as bundling) and delivering or transmitting those bundled contributions to a candidate or political committee.  RCW 42.17A.470.

With respect to the legal bundling undertaken by individuals, unless collected contributions are from the individual's employer, immediate family or an association to which the individual belongs, when delivering the contributions to the campaign, the individual must supply the following information to that campaign:

the individual's full name, street address, occupation, name of employer or, if self-employed, place of business and the same information for each person or entity for which a contribution is being transmitted.