If you are visitor from USA , then you might not need a passport to go to Cancun but you may require other documents listed below which can prove that you are a resident of USA and that would allow you to enter Cancun without the need for a US Passport. You might need the below documents along with valid photo identification to enter Cancun.
You can use any of the below documents without the need for passport
- Naturalization certificate
- Citizenship card
- Voter registration card
- Birth certificate
Note: To enter back into US, you may need a valid passport to board the flight but if you are travelling by land or sea then the passport is not required but remember Customs might not allow you enter US if you travel by air as you don’t have passport
And in addition to the above documents, you may also need valid photo identification like your Drivers license along with your photo (or) any state identification card with Photo. Children travelling have the option of submitting a passport but if not available they are required to submit same documents as an adult
If you are an minor below 16 years of age then you might require written consent from your parents or guardians in Spanish or English, Signed by a notary, a representative of the embassy, or local police (This also applied for a minor travelling with an adult other than father)