How a DUI Suspension Gets Invalidated

Winning a formal review hearing usually comes down to one thing: finding the defect in the Department’s paperwork or its proof. The suspension can be set aside in more ways than people expect, and the difference between winning and losing is often careful document review before the hearing. Here is what invalidates a Florida DUI suspension.

The officer or breath technician does not appear

The most common win is the simplest. If the arresting officer or the breath technician fails to appear in response to a properly served subpoena, the suspension must be invalidated. These are civil proceedings, and officers do not always treat them like court dates, so non-appearance happens, and when it does, the facts of the case no longer matter. A subpoenaed civilian witness who fails to appear is treated differently, but those two key officers are not.

Defects and inconsistencies in the documents

When the DHSMV relies on documents alone and those documents conflict, the suspension cannot be sustained unless sworn testimony explains the discrepancy. Conflicting dates and times, a refusal affidavit missing the time and place the test was offered, or a chronology that does not establish the arrest came before the breath request are all recognized grounds. Florida courts have been clear that a hearing officer cannot simply take the officer’s word for it or paper over inconsistencies.

Conclusory probable cause

A probable-cause affidavit that states conclusions without the underlying facts, no indication of where the information came from or how the officer reached it, is insufficient to sustain the suspension. The same is true when the paperwork does not show a lawful basis for the stop, or does not establish actual physical control of the vehicle. These are not technicalities; they are the elements the Department has to prove.

The strategic reason we review first and serve carefully

Here is the piece that separates a thorough defense from a routine one. If the documents already contain a defect that requires invalidation, serving the officer with a subpoena can hand the Department the chance to cure it with live testimony. So the order of operations matters: review every document for fatal defects first, and if one exists, do not serve the officer. Appear and move to invalidate on the record as it stands. If the officer shows up anyway and tries to fix the defect, object and request a continuance with a permit. Getting this sequence right is often the whole case.

The stop has to survive an objective test

A suspension built on a bad stop can fall. Florida judges the stop by an objective standard the Florida Supreme Court set in Dobrin v. Department of Highway Safety and Motor Vehicles, 874 So. 2d 1171 (Fla. 2004), the only implied-consent case to reach that court, which asks whether the facts in the record would justify the stop rather than what the officer subjectively had in mind. Where the report does not support the stated reason for the stop, the predicate fails. There is a live split in the circuits over whether an officer must use the so-called magic words about suspecting impairment, and that disagreement is itself an argument we can press, because a record that never states a lawful basis cannot carry the Department’s burden.

On a refusal, the arrest itself has to be lawful

A refusal suspension has an extra soft spot. The Florida Supreme Court held in Department of Highway Safety and Motor Vehicles v. Hernandez, 74 So. 3d 1070 (Fla. 2011), and again in Wiggins v. Department of Highway Safety and Motor Vehicles, 209 So. 3d 1165 (Fla. 2017), that a refusal suspension stands only if the refusal was incident to a lawful arrest, and that the hearing officer can invalidate the suspension after finding the arrest itself unlawful. A circuit court applied that rule in Kervin v. Department of Highway Safety and Motor Vehicles, 32 Fla. L. Weekly Supp. 1 (Fla. 7th Cir. Ct. 2024), where a driver taken to the hospital and under arrest for battery, not DUI, when the breath test was requested had his refusal suspension invalidated, because he was not under arrest for an offense that includes driving at the moment of the request.

Once you show a defect, the burden flips

The burden does not sit on you the whole way. Under the rule the Fifth District set in Department of Highway Safety and Motor Vehicles v. Farley, 633 So. 2d 69 (Fla. 5th DCA 1994), once the driver identifies a real deficiency in the predicate for the suspension, the burden shifts to the Department to sustain it. A defect the Department cannot cure on the record is fatal to the suspension, which is why the careful document review described above does so much of the work.

Get your evidence into the record

One discipline decides cases that should be winners. Anything you want the hearing officer to weigh has to be admitted into evidence, and merely pointing to it is not enough. A challenge failed for that reason in Furlow v. Department of Highway Safety and Motor Vehicles, 31 Fla. L. Weekly Supp. 569 (Fla. 13th Cir. Ct. 2024), where the driver’s lawyer relied on dash-camera video that contradicted the reports but never moved it into evidence, so the officer’s paperwork carried the day. We admit the video, the records, and every exhibit, and we object on the record when the Department tries to fill a gap it left open.

Grounds to invalidate questions

How can a DUI license suspension be invalidated?

A suspension is invalidated when the documents or the proof the DHSMV relies on fall short. Common grounds include the arresting officer or breath technician failing to appear, defects or inconsistencies in the sworn affidavits, conclusory probable-cause statements with no underlying facts, a chronology that does not show the arrest came before the test, and one breath reading below 0.08. If any required element is missing, the hearing officer must set the suspension aside.

What happens if the documents are inconsistent?

When the DHSMV relies only on documents and those documents conflict, the suspension cannot be sustained unless sworn testimony explains the discrepancy. Florida courts have held that the hearing officer cannot simply overlook inconsistencies in the paperwork, so conflicting dates, times, or accounts in the affidavits can win the hearing on their own.

Why might you not serve the officer?

If the documents already contain a defect that requires invalidation, serving the officer with a subpoena lets the Department cure that defect with live testimony. So the strategy is to review every document first. If there is a fatal defect, you do not serve the officer, you appear and move to invalidate on the paperwork. If the officer shows up anyway and fixes the defect, you object and ask for a continuance with a permit.

Does a low or split breath reading help?

Yes. If one breath reading is 0.08 or higher but the other is below 0.08, the DHSMV will invalidate the suspension, but only if you demand the formal review and raise the objection. Without the hearing and the objection, the suspension stands. This is a clean example of why the hearing matters.

What if the hearing is not held in time?

The hearing must be scheduled within thirty days of the DHSMV receiving your complete request. If that deadline is missed, the suspension is invalidated on proper objection. The thirty days does not begin until the filing fee is paid, so timing and proof of when the department received the request both matter.

Related: the formal review hearing, the administrative suspension, challenging the breath test, and search and seizure issues.

This page is general information about Florida law, not legal advice, and it does not create an attorney-client relationship. The Florida administrative suspension and review process is governed by sections 322.2615, 322.2616, and 322.64, Florida Statutes, and Chapter 15A-6 of the Florida Administrative Code, and license revocation, hardship, and reinstatement are governed by sections 322.271 and 322.28. Deadlines are short and the rules change, so confirm current requirements with the DHSMV or an attorney. Every case turns on its own facts, and past results do not guarantee a similar outcome.