Look online at the various Web sites that offer poetry contests. Check for reputable names that have been in business for a long time.
Find Web sites that offer a list of legitimate poetry contests. These sites will give you the basics of each contest, including the entrance fee and submission deadline.
Be careful of poetry contests that are free to enter. There are some legitimate companies that do not charge a fee, but most charge a modest reading fee.
Enter poetry contests that are held on an annual or semi-annual basis. Companies that hold contests year-round are not usually reputable.
Check for judges on the panel that are established poets with published works. If you have never heard of any of the judges, the contest is most likely a scam.