To fill out a leave of absence form, gather the medical or military certification that matches your reason for leave, then complete your employer’s form with your identifying information, the leave category that matches your certification, the exact start and end dates, and your choice on substituting paid time off. Sign it, submit it to your human resources contact through the channel your employer designates, and keep a copy of everything you sent. If your employer is covered by the Family and Medical Leave Act, the form and the process that follows are largely standardized by federal regulation.
Confirm You Qualify Before You Start
FMLA covers private employers with 50 or more employees. To be an eligible employee, all three of these must be true:
- You’ve worked for the employer for at least 12 months (they don’t have to be consecutive).
- You’ve worked at least 1,250 hours in the 12 months right before your leave begins. Only hours actually worked count; paid time off doesn’t.
- Your employer has 50 or more employees within 75 miles of your worksite.
If you fall short on any of the three, federal FMLA won’t apply to your request. More than a dozen states and the District of Columbia have their own paid family leave programs, and some cover smaller employers or use shorter tenure requirements, so check your state law before assuming you have no protection.
Gather the Right Certification First
The single fastest way to stall a leave request is turning in the form without the supporting document. Pull the certification together first, then fill out the form.
Your Own Serious Health Condition
Your employer will likely ask for Department of Labor Form WH-380-E, completed by your healthcare provider. The form asks the provider to describe the condition, its probable duration, and whether you need continuous or intermittent time off. A diagnosis is optional; the form specifically treats symptoms, diagnosis, and treatment details as information the provider may but is not required to disclose.
Care for a Family Member
To care for a spouse, child, or parent with a serious health condition, the equivalent form is WH-380-F. Your family member’s healthcare provider completes it, covering the same ground plus whether your presence is medically necessary.
Military-Related Leave
If you’re leaving for military service, the Uniformed Services Employment and Reemployment Rights Act requires advance notice to your employer unless military necessity makes that impossible. A copy of your orders or a letter from your commanding officer satisfies the requirement; the notice can be verbal or written and follows no particular format.
Separately, FMLA provides up to 26 workweeks in a single 12-month period if you’re the spouse, child, parent, or next of kin of a covered servicemember with a serious injury or illness. That’s more than double the standard 12-week entitlement and covers both current servicemembers and veterans discharged within the previous five years.
Leave Types That Don’t Use a Federal Form
No federal law requires private employers to grant bereavement leave, though your company policy may. Religious observance is handled under Title VII as a reasonable accommodation, not through a standard certification. For federal jury service, federal law protects you from being fired or threatened, and providing a copy of the jury summons to your employer is generally all that’s expected. If your employer’s form covers these situations, follow the internal policy; there is no federal certification to attach.
Filling Out the Form Field by Field
The layout varies by employer, but the fields are consistent. Work through them in order.
Identification. Enter your full legal name, employee ID number, department, and job title. Use exactly what appears on your pay stub. A nickname or shortened name can cause processing delays because these fields link your request to payroll and benefits records.
Leave category. Check the box that matches your reason. Common options include your own serious health condition, care for a family member with a serious health condition, birth or placement of a child, qualifying military exigency, and military caregiver leave. The category you pick must match the certification you’re attaching. A mismatch here is the kind of small error that comes back as a request for clarification and costs you days.
Dates. Enter the exact start and end dates of the leave you’re requesting. If your absences will be intermittent rather than continuous, estimate how often you expect to be out and how long each episode will last; your medical certification should support those estimates. FMLA permits intermittent leave when medically necessary, but for bonding with a newborn or newly placed child, intermittent leave is available only if your employer agrees.
Paid leave substitution. Most forms ask whether you want to use accrued vacation, sick time, or PTO during the leave. You can elect to use it, and your employer can also require you to use it. Either way, the paid leave runs at the same time as FMLA. It does not add weeks to your 12-week entitlement.
Signature. Signing certifies the information is accurate. If the form is digital, an electronic signature through your employer’s HR system typically counts.
Submitting It and Keeping Proof
Where to send the form depends on your employer’s setup. Large companies often route everything through an internal HR portal or a third-party leave administrator. If you’re submitting on paper or by email, send it to the HR representative responsible for leave administration, not to your direct supervisor.
Mailing? Use certified mail with a return receipt so you have proof of delivery and the date it arrived. Keep a copy of the completed form, every certification you attached, and any delivery confirmation. This paper trail is what protects you if a dispute comes up later.
On the employer’s side, any medical certifications, recertifications, or medical history documents must be stored in a separate confidential file, not in your regular personnel folder. Your direct supervisor is barred from contacting your healthcare provider. Only a human resources professional, leave administrator, or other management official may reach out to the provider, and only to clarify or authenticate information already on the certification. Federal regulations also require your employer to keep all FMLA-related records, including your request and certifications, for at least three years.
What Your Employer Must Do After You Submit
Once your request is in, federal regulations put your employer on a clock. Knowing the deadlines helps you spot when something has stalled.
Eligibility Notice
Within five business days of your request, or of learning your leave might qualify, your employer must tell you whether you’re eligible for FMLA. If you’re not, the notice must explain why, such as insufficient hours or worksite size.
Rights and Responsibilities Notice
Along with the eligibility determination, your employer gives you a notice spelling out your rights and responsibilities during the leave. It covers whether you need to submit medical certification, whether paid leave will be substituted, and how to handle your health insurance premiums while you’re out.
Designation Notice
After your employer has enough information to decide, usually after receiving your medical certification, you should receive a designation notice within five business days. It tells you:
- Whether your leave is approved as FMLA-qualifying
- How much leave will be counted against your 12-week or 26-week entitlement
- Whether you’ll need a fitness-for-duty certification before returning
- Whether accrued paid leave will be substituted for unpaid FMLA leave
If the request is denied, the designation notice must state why. Common reasons include insufficient tenure, not enough hours worked, or a certification that doesn’t establish a serious health condition.
The 15-Day Certification Deadline
If your employer asks for a medical certification and you haven’t already turned one in, you generally have 15 calendar days to deliver it. Miss the window without a good reason and your employer can deny FMLA protection until you turn in a complete certification. If your provider needs more time, tell HR immediately. The deadline can be extended when 15 days is impractical despite your good-faith effort.
Second and Third Opinions
If your employer doubts the validity of your certification, it can require a second opinion from a different healthcare provider at its own expense. You don’t pick the provider, but the employer can’t use a doctor it regularly employs. If the first and second opinions conflict, a third opinion may be required, also at the employer’s expense. You and your employer jointly select that third provider, and the third opinion is final and binding on both sides.
If Something Goes Wrong
If your employer interferes with your leave rights, retaliates against you for requesting or taking FMLA leave, or refuses to restore you to your position, you can file a complaint with the Department of Labor’s Wage and Hour Division. Call 1-866-487-9243 or submit your concern through the division’s online contact page. Complaints are confidential. The agency won’t disclose your name, the nature of the complaint, or even that a complaint was filed. Employers are prohibited from retaliating against anyone for filing a complaint or cooperating with an investigation.