Who Fills Out the Function Report for an Adult Child's SSDI Claim?

When a parent contacts the Social Security Administration on behalf of a disabled adult child, one question comes up quickly: who is actually supposed to complete the Function Report? The answer depends on the child's age, their cognitive and functional capacity, and their legal status within the claim — and getting it wrong can slow down or complicate a case.

What Is a Function Report and Why Does It Matter?

The Function Report (SSA-787 or SSA-3373) is a detailed questionnaire the Social Security Administration uses to understand how a disability affects daily life. It asks about things like:

• Ability to dress, bathe, and prepare meals independently
• Concentration, memory, and following instructions
• Social interactions and managing emotions
• Physical abilities like standing, walking, lifting, and sitting

SSA disability examiners at the Disability Determination Services (DDS) level use this information alongside medical records to assess a claimant's Residual Functional Capacity (RFC) — essentially, what the person can still do despite their impairments. This feeds directly into whether SSA concludes the claimant can perform any type of work.

A poorly completed Function Report can underrepresent how severe a condition actually is. A thorough, specific one can meaningfully support an approval.

Who Fills It Out: The Adult Child or the Parent?

This is where parents often get confused. Here's the general framework:

If the adult child is the claimant, SSA's default expectation is that the claimant fills out their own Function Report. Even if you, as a parent, helped with the application or are deeply involved in your child's care, the Function Report is typically the claimant's document.

However, there are important exceptions:

When a Parent or Third Party Can Complete It

SSA may ask a separate person — sometimes called a third-party reporter — to complete their own Function Report about the claimant. This is a different form from the claimant's own report, and it's specifically designed to gather observations from someone who knows the claimant well.

📋 This third-party Function Report is a legitimate, valued part of the record. Parents, caregivers, and other close contacts regularly complete these to corroborate what the claimant reports — or to fill in gaps where the claimant's own account may be limited.

Situations where a parent is most likely to be involved in completing or substantially assisting with the report include:

Representative Payees and Legal Guardians

If a parent has been designated as a representative payee — someone who manages SSDI payments on behalf of a beneficiary — that doesn't automatically mean they complete the Function Report. Representative payee status relates to managing funds, not to SSA's documentation process during the disability evaluation.

Similarly, legal guardianship may give a parent authority to complete forms on behalf of an adult child who cannot manage their own affairs, but this typically needs to be documented with SSA.

What the Function Report Should Actually Capture 🎯

Regardless of who completes it, the report needs to reflect the worst days, not the best. SSA is not looking for an optimistic summary. Examiners want to understand how the condition affects the claimant on a typical or difficult day.

Common mistakes that can weaken a Function Report:

• Overstating ability — saying someone can cook a meal without noting it takes three times longer and leaves them exhausted
• Vague language — writing "some difficulty walking" instead of "can only stand for 10 minutes before pain forces a rest"
• Skipping sections — leaving blanks signals missing information, which can hurt credibility

If a parent is assisting an adult child with completing the form, the goal is accuracy — specific, concrete, and consistent with what treating doctors are documenting.

How This Fits Into the Larger Claims Process

The Function Report is collected early, usually during the initial application stage or sometimes at the reconsideration stage if SSA requests updated information. It's reviewed by DDS examiners who have not met the claimant and who are building a picture entirely from documents.

If a claim is denied and moves to an ALJ (Administrative Law Judge) hearing, the Function Report becomes part of the official record. A judge may reference it when evaluating how consistent the claimant's reported limitations are with their medical records and hearing testimony.

The Variables That Shape How This Plays Out

Whether a parent's involvement in a Function Report helps, is neutral, or creates complications depends on factors that vary from one case to another:

• The nature and severity of the adult child's impairment
• Whether the adult child has documented cognitive or psychiatric limitations
• The claimant's legal status (guardianship, conservatorship, independent adult)
• Whether SSA specifically requested a third-party report
• The stage of the claim — initial, reconsideration, or hearing

Some adult children with significant physical disabilities can speak clearly and thoroughly to their own limitations. Others, particularly those with intellectual disabilities, traumatic brain injuries, or severe psychiatric conditions, may need substantial support — or may not be able to meaningfully complete the form without it.

The line between "helping" and "completing on their behalf" matters to SSA, and how that line applies to a specific adult child's claim hinges on their particular diagnosis, documented capacity, and the supporting evidence already in the file.