Washington gives you fifteen days and three choices on a traffic infraction, and each one carries a different price in money, time and record.

Washington gives a driver fifteen days from issuance to respond to an infraction citation. The response can be payment, a mitigation request or a contest request, but something has to be filed.
Meeting the deadline does not require sending money. Requesting either kind of hearing satisfies the response requirement and pushes the financial question further out.
At a mitigation hearing the judge can lower the penalty or set installments after hearing the circumstances. The finding itself stays on the driving abstract.
Mitigation reduces money, not record
The back of a Washington traffic citation is a small document with a large deadline printed on it. You have fifteen days from the day the officer handed it to you, or mailed it, to tell the court which of three things you intend to do, and the clock does not care whether you were traveling, whether the ticket went to an old address, or whether you disagree with every word on the front. The three responses are not interchangeable. They lead to different rooms, different outcomes, and different long-term costs, and choosing among them badly is the most common way a routine ticket turns expensive.
What the statute requires within fifteen days is a response, not necessarily money. You can pay the penalty, which is an admission that you committed the infraction. You can request a mitigation hearing, which admits the infraction but asks the judge to reduce the amount or set a payment plan. Or you can request a contested hearing, which denies it and puts the state to some proof. Any of the three, mailed or filed in time, keeps the case alive and under your control. Silence does not.
Notice what the deadline is really protecting. Fifteen days is short enough that most drivers pay simply because paying is the one option that requires no scheduling, no time off work, and no second thought. That convenience is priced into the system, and it is worth understanding what you are buying with it before the envelope goes back.
When you pay, the court enters a finding that you committed the infraction, and that finding is reported to the Department of Licensing and sits on your abstract. Moving violations are visible to insurers, and the practical cost of a single speeding finding is usually not the ticket amount but the surcharge that follows it across two or three policy renewals. Nobody quotes you that number when you write the check. For drivers holding a commercial license the arithmetic is harsher still, because the federal rules administered by the Federal Motor Carrier Safety Administration govern how commercial licenses are treated and leave far less room to soften a finding after the fact.
A mitigation hearing asks the court to be lenient about the penalty. You concede that it happened, you explain the circumstances, and the judge can reduce the amount or give you time to pay. What a mitigation hearing almost never does is remove the finding from your record, so the insurance consequence survives intact. It is the right choice when money in the next ninety days is the binding constraint and the record is not.
A contested hearing asks whether the state can establish the infraction at all. The officer may be subpoenaed, the certification of the speed measuring device may be examined, and the declaration itself may be challenged for what it fails to say. This is also the setting where a negotiated amendment or a deferred finding becomes possible, which is the outcome most drivers actually want: the money paid, the record clean. That arithmetic is what most people are weighing when they go looking for a Traffic Attorney Seattle, whether or not they would describe it in those terms.
Ignoring the citation does not make it lapse. After the response window closes the court can enter a default finding, which imposes the original penalty without any argument from you, and then adds a failure to respond penalty on top of it. The unpaid balance is commonly referred to collections, where an agency fee is added to a sum that was already larger than the ticket. On a moving violation the court also notifies the Department of Licensing, and a license suspension follows. Driving after that point is no longer an infraction at all; it is a criminal charge with a booking photo attached.
The escalation is entirely mechanical, which is the useful part. Each step is triggered by a missed date rather than by anyone's judgment about you, and each step can be interrupted by filing something. Courts in Washington will generally set a hearing on a late request, reopen a default, or accept a motion explaining why the response never arrived, and drivers who move quickly usually land back where they started, with the same three choices available.
Representation costs a flat fee on most infractions, and the fee is worth paying when the record matters more than the money: a driver near a suspension threshold, a commercial license holder, someone whose insurance renewal is close, an employee whose job description includes driving. It stops making sense when the record consequence is small and the fee approaches or exceeds the total exposure, which is often the case with a non-moving violation, a parking or equipment citation, or a first minor infraction on a clean abstract that a mitigation hearing will handle in twenty minutes. The honest test is not whether you can win. It is what winning is worth to you, in dollars, over the next three years.
Work that number out before the fifteenth day, because every option stays open while the deadline holds and the cheapest ones close first.