How to Complete an FMLA Request in the United States (2026): Certification, Timelines and Employer Response

Who the law actually covers

The Family and Medical Leave Act of 1993 (29 USC §2611 et seq.) applies to private employers with 50 or more employees within 75 miles of the worksite. Public agencies and elementary or secondary schools are covered regardless of headcount. Before any request can succeed, three employee-side hurdles must be cleared: at least 12 months worked for the current employer (not necessarily consecutive), at least 1,250 hours logged in the 12-month period immediately before leave starts, and work at a location that meets the 50-employee threshold.

Qualifying reasons under 29 USC §2612(a)(1) include the employee's own serious health condition, care for a spouse, child, or parent with a serious health condition, birth or placement of a child for adoption or foster care, and qualifying military exigency. Each reason triggers a different DOL certification form, so matching the right form to the right leave type is the first practical step.

State law often extends these thresholds. California's California Family Rights Act (Gov. Code §12945.2) covers employers with five or more employees. New York's Paid Family Leave law (Workers' Compensation Law Article 9, §§200 et seq.) provides up to 12 weeks of paid leave funded through payroll deductions. Federal FMLA sets the floor; state law may raise it considerably.

Giving notice — timing and content

For foreseeable leave — a scheduled surgery, a planned chemotherapy cycle, a known due date — you must give at least 30 days' advance notice when practicable (29 CFR §825.302). When 30 days is not possible, notice must come "as soon as practicable," a standard the Department of Labor reads as one to two business days after learning of the need.

For unforeseeable leave, the same "as soon as practicable" rule applies — typically the same or next business day. You do not have to say "FMLA" or cite any statute. Telling a supervisor you need time off for heart surgery is enough to put the employer on notice and trigger their obligation to evaluate whether the situation might qualify.

Follow the employer's standard call-in procedure even for FMLA-qualifying absences (29 CFR §825.303(c)). An employee who texts when the policy requires a phone call, or who calls a general HR line when the policy designates a direct supervisor, complicates an otherwise valid claim. Document notice with timestamps — an email, a text log, or an entry in an HR portal all work.

What the employer must do within five business days

Once you give notice of a potentially FMLA-qualifying need, the employer has five business days to respond with Form WH-381 (Notice of Eligibility and Rights & Responsibilities). That form tells you whether you appear eligible, which certification form is required, and when the certification is due. Employers who skip WH-381 cannot later deny leave on grounds that certification arrived late, because the certification clock only runs from the date WH-381 is actually provided.

Completing WH-380-E: the employee's serious health condition

WH-380-E covers leave for the employee's own condition. A licensed healthcare provider must complete it — under 29 CFR §825.125, that includes physicians, nurse practitioners, physician assistants, and clinical psychologists, among others. The form asks for:

• The approximate onset date and expected duration of the condition
• Medical facts supporting classification as a "serious health condition" under 29 CFR §825.113–§825.115 (requiring inpatient care or continuing treatment — including at least two outpatient visits within 30 days of the first day of incapacity, with the first visit occurring within seven days)
• Whether the employee is unable to perform any essential function of the position
• For intermittent leave: the expected frequency and duration of each absence episode

The employer cannot contact your treating provider for additional information beyond what the form requests. Only the employer's own healthcare professional may reach out, and only to authenticate or clarify a specific response — not to probe for diagnoses or request records. Broader contact likely violates the HIPAA Privacy Rule (45 CFR §164.512(b)).

For care of a family member, use WH-380-F. Military caregiver leave uses WH-385. Using the wrong form restarts the clock and can result in an avoidable denial.

The 15-day certification window and the cure process

You have 15 calendar days from receiving WH-381 to return a completed certification. Circumstances beyond your control — a specialist who is out of the country, a records retrieval delay — justify an extension, but the request must come before the deadline passes, not after.

When a certification comes back incomplete, the employer cannot deny leave outright. Under 29 CFR §825.305(c), the employer must advise you in writing of the specific deficiency and give you at least seven calendar days to correct it. An employer who denies leave without first following the cure step faces an interference claim under 29 USC §2615(a)(1), which bars any action that discourages or prevents exercise of FMLA rights.

A free FMLA request form from forms-legal.com can help employees and HR departments organize the initial request before the official DOL certification forms come into play.

Employer response: the Designation Notice (WH-382)

After a complete certification arrives, the employer has five business days to issue Form WH-382, designating the leave as FMLA-qualifying or not. The form must specify the amount of leave approved, whether paid leave runs concurrently, and any fitness-for-duty requirement on return.

Employers who fail to timely designate may lose the right to retroactively challenge leave that has already been taken (29 CFR §825.301(d)). Waiting in silence does not protect the employer. If the certification is disputed, the employer may require a second opinion from a provider of their choosing, at their own expense. A third opinion from a mutually agreed provider is binding on both parties under 29 CFR §825.307(c).

How intermittent leave works

Intermittent FMLA generates more workplace disputes than any other leave category. Under 29 USC §2612(b)(1), qualifying conditions can be taken in separate blocks or through a reduced schedule — and once certified, individual absences require only "as soon as practicable" notice, not advance scheduling.

For unpredictable chronic conditions like Crohn's disease or migraines, calling in the morning of an absence is typically sufficient. Retroactive notice is available when advance notice was genuinely impossible; notice must be given as soon as practicable after the absence, which the DOL generally reads as the same or next business day under 29 CFR §825.303.

Recertification is limited to no more than every 30 days, and only in connection with an actual absence. For conditions lasting more than 30 days, recertification can be requested every six months regardless of absences (29 CFR §825.308). Early recertification is permitted when the pattern of absences is substantially broader than the original certification predicted — for example, a certification projecting one episode per month when the employee is actually absent three times a week.

Employers must track intermittent leave in the smallest increment used for other leave types, with a floor of one hour. A payroll system that already tracks in 15-minute increments must apply that same granularity to intermittent FMLA absences.

Substitution of paid leave: what runs concurrently

FMLA leave is unpaid unless the employer requires — or the employee elects — substitution of accrued paid leave. Under 29 CFR §825.207, the employer may require substitution when existing paid-leave policy would otherwise allow the employee to use that leave for the same reason. Both types of leave then run simultaneously, not back to back.

Employees sometimes assume that using vacation or sick pay pauses the FMLA clock. The 12-week entitlement counts down regardless. Short-term disability benefits can also run concurrently when the employer designates them as such and the disability meets the serious-health-condition definition.

Job restoration rights

Returning employees are entitled to the same position or an equivalent one under 29 USC §2614(a)(1). An equivalent position carries identical pay, benefits, schedule, and substantially similar duties. Employers who restructure a role specifically to eliminate a returning employee's job face retaliation exposure under 29 USC §2615(a)(2), particularly when the restructuring coincides with the return date and lacks a documented business reason independent of the leave.

"Key employees" — those in the top 10% of salaried workers within 75 miles — may be denied reinstatement only if the employer can demonstrate substantial and grievous economic injury and provided written notice of the key-employee designation before the leave began (29 USC §2614(b)).

Fitness-for-duty certifications may be required as a return condition only when stated in the WH-382 Designation Notice. Employers cannot demand them for each intermittent absence unless a serious safety concern exists and they communicate that requirement in writing (29 CFR §825.312(g)).

Filing a complaint when FMLA rights are violated

Employees can file a complaint with the DOL's Wage and Hour Division within two years of a violation — three years for willful violations (29 USC §2617(c)). The WHD can order retroactive leave designation, back wages, and reinstatement. Private lawsuits on the same timeline can yield actual damages, equitable relief, and attorney fees.

Interference (discouraging or denying leave) and retaliation (adverse action for using leave) are distinct legal theories. An employer can face both from the same facts — for instance, miscounting leave to pressure an employee to return early, then cutting their hours when they complain.

Keep contemporaneous records: dates of notice, names of supervisors notified, dates forms were submitted, and any statements made about the leave. A timestamped email trail has decided more than a few FMLA disputes in employees' favor.