ServSafe actually has a compiled list of documents which identify a lot of information about the various aspects of alcohol sales within each state. I've separated them into three categories based on whether the state allows, disallows, or does not regulate it one way or the other.
Of course, keep in mind that these are state laws and laws may be even more specific at the city or county level.
States that allow confiscating IDs
Alaska
Yes, licensees may confiscate false IDs and must turn the confiscated IDs over to law enforcement as soon as possible.
Arizona
Permitted
California
A licensee or his employee may seize any identification from a person that shows to be under 21 or false, so long as a receipt is given to the person from whom it was seized and the seized identification is given over to the local law enforcement agency that has jurisdiction over the premises with in 24 hours.
Colorado
Establishments in Colorado may confiscate false IDs. Contact the Colorado Liquor Enforcement Division or local government for the relevant statutes and information.
District of Columbia
Confiscation is not authorized by law it may be done by licensees
This language is unclear, but appears to say that licensees may confiscate.
Georgia
Licensees may confiscate false IDs if they report the confiscation to the local law enforcement. Consult Georgia statutes for specifics.
Hawaii
Yes, due to it being illegal for any minor to use a fake id or the identification of another person in an attempt to purchase liquor or to obtain employment to serve or sell liquor in a licensed establishment.
Reasoning does not make sense on this one. It's illegal everywhere, but that doesn't necessarily give licensees the right to confiscate.
Idaho
Licensees may confiscate false IDs. After the ID is confiscated, it should be turned over to the ABC or a local law enforcement agency.
Iowa
Licensees may retain false IDs. If it appears to be altered, falsified or belong to someone else. If the ID is a state-issued license or ID card, the licensee must provide written receipt of retainment to the person from whom the card was taken. Within twenty-four hours the card must be delivered to local law enforcement and the licensee must file a written report of the incident. Licensees may be subject to criminal prosecution or civil liability for retaining state-issued ID if proper procedures are not followed or it excessive force is used in obtaining the identification. See Iowa code section 123.48.
Kentucky
Operators should confiscate fake ID’s and turn them over to local police.
Maine
Licensees may retain false IDs without liability. It must be for a reasonable period of time and the licensee must make a good faith effort to determine legal age. The holder of the ID must be informed of why the ID is being held.
Michigan
Michigan authorizes licensees to confiscate IDs they recognize as false. Adulterated/fraudulent ID may be confiscated. Unadulterated ID should not be confiscated (ex. Minor purchasing with own ID).
Minnesota
A licensed retailer or municipal liquor store may seize an ID if the retailer or municipal liquor store has reasonable grounds to believe that it has been altered or falsified or is being used to violate any law. It must be delivered to a law enforcement agency within 24 hours of seizing it.
Missouri
Yes
Montana
Yes, operators should confiscate fake IDs and turn it over to the local
authorities unless their life is threatened.
Nebraska:
Nebraska does not prohibit licensees from confiscating false IDs. Licensees may also use a documentary proof of age
New Hampshire:
An ID recognized as false can be confiscated for a reasonable length of time to make a good faith effort to determine whether the person is of legal age of to notify law enforcement officials of a suspected violation of law.
New Jersey:
May confiscate, but not required to take a suspected fake ID. Licensees and servers are cautioned to exercise caution. Has option to refuse service at any time to any person suspected of being under legal drinking age or intoxicated.
New Mexico:
New Mexico affirms that an ID is personal property; if an establishment chooses to confiscate the document, it is their decision.
Honestly not sure how to parse that. The first sentence makes it seem as though confiscating would be theft, but the second seems to imply there is nothing wrong with them doing so.
North Carolina
Establishments may confiscate IDs they recognize as false.
Oklahoma
Licensees may hold identification until authorities are notified and ID is turned in.
Oregon:
Yes and if DMV identification is used in misrepresentation, the minor's driving privileges may be suspended for up to one year and/or the minor will have to wait for up to one year to apply for a driver's license.
Rhode Island
Yes
Wisconsin
125.039 Civil liability exemption for retaining proofs of age. "No person who holds a license or permit and no employee of such a person is civilly liable for retaining a document presented as proof of age for a reasonable length of time in a good faith effort to determine whether the person who presented the document is a underage person or to notify a law enforcement authority of a suspected violation of s. 125.085 (3) (a) or (b)."
States that do NOT allow confiscating IDs
Alabama
Alabama law does not authorize licensees to confiscate false IDs. However some establishments have chosen to take this step. Any seized ID should be turned over to the local police department of Alabama ABC immediately.
The second sentence suggests this may just be unregulated versus a hard ban, but classified as not allowed for now.
Arkansas
Establishments cannot confiscate false IDs. If a false ID is identified, establishments should call the local police department.
Connecticut
Rather than confiscate the ID, the licensee may require the guest whose age is in doubt to sign a sworn statement, on forms provided by the state that they are of age and understand the penalties for misrepresenting their age to purchase alcohol. In addition, the licensee may take a photo of the guest and make a photocopy of the ID of the guest in question. Both of these may be used as a defense in the event the licensee is charged with serving a minor.
Florida
Florida does not authorize licensees to confiscate false IDs. Licensees who recognize false IDs should refuse the sale and contact local law enforcement.
Indiana
No, may not confiscate. But a permittee has the right to demand that a customer sign a written statement on a form prescribed by the Alcohol and Tobacco commission stating that they are not a minor. Retailers should contact local police is they suspect a minor is carrying a fake ID.
Kansas
Kansas authority does not recommend confiscating false IDs. Licensees should notify local authorities.
Though "does not recommend" suggests it is not actually regulated.
Maryland
Licensees in Maryland have no legal authority to confiscate false IDs.
New York
Licensees are not authorized to confiscate IDs they recognize as false. Licensees should notify the police or local law enforcement officials and refuse sale.
North Dakota
Any licensee may keep a book and may require anyone who has shown documentary proof of his age, which substantiates his age to allow the purchase of alcoholic beverages, to sign the book if the age of that person is in question. The book must show the date of the purchase, the identification used in making the purchase and the appropriate numbers of such identification, the address of the purchaser, and the purchaser’s signature.
Pennsylvania
Pennsylvania licensees should contact a law enforcement officer rather than retain an obviously fraudulent ID.
South Dakota
SDCL 35-9-2.1 allows a merchant to detain someone they believe is under the age of 21 or is using a false identification if they have posted a notice stating they may detain a person they believe is under the age of 21, or is using a false identification, in a reasonable manner and for a reasonable amount of time in order to reasonably verify their identification and to inform law enforcement officers or parents of a minor.
Classifying as not allowed, since they're only allowed to detain and this implies that if proper signage is not posted, they would not be allowed to detain or confiscate.
Tennessee
Tennessee law does not allow licensees to confiscate false IDs. Licensees who recognize an ID as false should contact a TABC agent or the local police.
Virginia
Virginia does not authorize the confiscation of false IDs; licensees should contact an ABC agent or the local police department.
Washington:
Licensees may not confiscate an ID they believe to be false. Licensees are urged to call local law enforcement officials or their local liquor agents and advise them of the situation.
States that do not regulate
Delaware
Not regulated
Illinois
Operator may confiscate fake IDs, if comfortable doing so, and turn in to local law enforcement. But not officially regulated by state.
Louisiana
Per the Louisiana Office of Alcohol & Tobacco Control, "there is no written policy when it comes to the responsibility of the licensed permittee and fake IDs. Of course, you would want to get the fake ID from the suspect, however, that may not always be the safest course to go. If it becomes an unsafe situation, then let the suspect leave with the ID. If possible, get the person's name off the ID and notify the police. Do not place your employees in harm's way in order to attempt to secure the fake ID. This is something that each location may want to discuss with their employees and develop some sort of policy."
Massachusetts
Massachusetts does not have any statute or state regulation addressing this subject.
Mississippi
For information on this topic contact the Miscellaneous Tax Division, State
Tax Commission at 601-923-7175.
Nevada
Regulated at the city and county level.
Ohio
Ohio does not have specific state laws which specify whether an establishment may or may not seize a false ID.
South Carolina
None
Texas
Not regulated
Utah
Not regulated
Vermont
None
Wyoming
None
The page for West Virginia does not seem to exist.