I was recently having a discussion with a neighbor regarding door-to-door solicitors and thought that I would share some information. First off, the direct link to the Gwinnett County municipal code regarding solicitors may be found here: ARTICLE IX. CANVASSER OR SOLICITOR.

The following is an excerpt:
Sec. 18-239. Unlawful or prohibited activities.
The following are prohibited practices for canvassers and solicitors and any violation shall constitute grounds for suspension, revocation, or denial of renewal of certificate or permit, and/or arrest.
(1) Canvassing or soliciting on Sunday, or between the hours of 7:00 p.m. and 9:00 a.m. Monday through Saturday.
(2) Canvassing or soliciting at any location where a sign is posted at or near the main entrance or driveway to the residence or business prohibiting such activity.
(3) Using any entrance, or part of the building, other than the main entrance to the residence or business.
(4) Entering a residence except at the express invitation of the occupant.
(5) Failure of the canvasser or solicitor to inform the occupant in plain terms of the purpose of the call.
(6) The canvasser or solicitor to represent that they are participating in any contest, game or other competitive endeavor, or that they are offering the occupant an opportunity to participate in any such contest, game or endeavor.
(7) The canvasser or solicitor to use vulgar, insulting or threatening language in the course of any solicitation.
(8) The canvasser or solicitor to remain upon the property of the residence or business after the occupant has verbally indicated that they do not wish to make a purchase or donation. For the purpose of this chapter, a solicitation shall be deemed to continue until the solicitor has left property of the residence or business.
(9) Canvassing or soliciting anyone under the age of 18.
(10) Failure of canvasser or solicitor to have a valid permit prominently displayed on their person (upper front portion of the body commonly referred to as the top of the shoulders down to the waist) or refuse any customer or prospective customer’s request to examine same. All canvassers or solicitors of non-profitable organizations who solicit funds without a certificate or permit shall have prominently displayed documentation identifying themselves, their organization including tax exempt status, and shall not refuse any customer or prospective customer the right to examine same upon request. Except that canvassers or solicitors of non-profit organizations who are under the age of 15 are not required to display or produce for examination any documentation.
(11) For more than two canvassers or solicitors to engage in solicitation upon any residence or business at the same time for the same goods or services.
(12) Canvasser or solicitor to make more than one solicitation call at the same residence within any consecutive two-week period without receiving prior invitation from the occupant of such residence.
(13) Canvasser or solicitor to violate any of the provisions of this chapter, or to violate any other county ordinance while engaging in any of the activities described.
(14) Canvasser or solicitor to engage in any of the conduct described in this chapter during a period in which their certificate or permit is denied, suspended, or revoked.
(15) Canvasser or solicitor to lend, rent, or sell their certificate or permit card to another, or canvass or solicit using the certificate or permit card of another.
(16) The canvasser or solicitor to deviate from the stated guidelines as set out in the certificate or permit application or amendments thereto filed by applicant or certificate holder.

On a more personal note, a few years ago I went up to the Mountain Park Ace Hardware and purchased a five dollar “No Solicitors” sign and affixed it to the house next to the doorbell. It has dramatically cut down the number of solicitors who actually ring the bell. I have witnessed them walk up the driveway, see the sign and turn around and walk away.

Additionally, I would highly recommend that should you have a house dog, of any temperament, get a “Beware Of Dog” sign and affix it to a place near your front door,… just in case.