Family Law Discovery Workbook: A Guide to Written and Oral Discovery

Discliamer: This material is provided for informational and educational purposes only and does not constitute legal advice. Viewing or using this content does not create an attorney-client relationship. You should not act upon this information without seeking advice from a qualified attorney regarding your specific situation.

What Is Discovery?

Discovery is the formal process of exchanging information and evidence in a court case before trial or settlement. In Illinois family law matters, discovery often focuses on income, assets, debts, employment, business interests, parenting issues, communications, and other facts that may affect the outcome of the case. The goal is to reduce surprises, identify the real issues, and allow both sides to make informed decisions. In many cases, good discovery helps move the case toward settlement; in others, it helps your attorney prepare for an evidentiary hearing or trial. In Illinois, discovery in family law cases is generally governed by the Illinois Supreme Court Rules that apply to civil discovery, along with any local rules, standing orders, and case-specific court orders.

Why Discovery Matters in Family Law

• It helps uncover the facts about income, assets, debts, and expenses.
• It allows each side to evaluate the strengths and weaknesses of the case.
• It can reveal missing documents, inconsistent statements, or hidden issues.
• It helps attorneys prepare for negotiation, mediation, hearings, and trial.
• It creates a record that can be important if a party later changes positions.
• It can narrow the issues and save time by identifying what is truly contested.

Written Discovery

Written discovery is exactly what it sounds like: formal written requests sent between the parties in the case. In Illinois, written discovery is commonly governed by the Illinois Supreme Court Rules on civil discovery, and responses often must be served within 28 days unless a different deadline applies by agreement, court order, or a specific rule. These requests usually require written answers, document production, or admissions. In family cases, written discovery often works alongside mandatory financial disclosures, such as financial affidavits. Because incomplete or inaccurate responses can create serious problems, it is important to review every request carefully and work closely with your attorney before responding.

Interrogatories

Interrogatories are written questions that one party sends to the other party. In Illinois, interrogatories are addressed by Illinois Supreme Court Rule 213. The receiving party generally must provide written answers or objections within 28 days, and the answers are typically sworn. You must tell the truth when responding to an interrogatory, or you risk being sanctioned by the court. Illinois also generally limits the number of interrogatories to thirty questions (30), including subparts, unless the parties agree otherwise or the court grants leave. In family law cases, interrogatories often ask about:

• Employment and income sources
• Bank accounts and financial institutions
• Real estate and personal property
• Debts and monthly expenses
• Retirement accounts, investments, and business interests
• Parenting facts, witnesses, and relevant events

Tips for answering interrogatories in Illinois:

• Answer truthfully and completely because your responses may be sworn and may be used later in the case.
• Do not guess if you are unsure; tell your attorney what you know and what needs to be verified.
• Be consistent with your financial affidavit, prior filings, and other records.
• Do not leave out information because it seems unimportant or embarrassing.
• Draft your answers carefully with your attorney before anything is signed or served.

Requests for Production of Documents

Requests for production ask a party to provide documents, electronically stored information, or other tangible items relevant to the case. In Illinois, these requests are addressed under Illinois Supreme Court Rule 214, and responses are often due within 28 days. In family law cases, requests to produce often overlap with the statewide Financial Affidavit and the supporting records needed to verify income, assets, debts, and expenses. Common requests include:

• Tax returns and supporting schedules
• Pay stubs and proof of compensation
• Bank, credit card, and loan statements
• Retirement and investment account statements
• Mortgage records, deeds, and appraisals
• Business records if a party is self-employed or owns a company
• Texts, emails, calendars, photographs, or social media content when relevant

Tips for document production:

• Start gathering documents early. Waiting until the deadline creates stress and increases the chance of mistakes.
• Provide complete records whenever possible, not selected pages.
• Organize documents by category and date.
• Do not alter, delete, or "clean up" documents, messages, or files.
• Tell your attorney if records are missing, incomplete, or controlled by someone else.
• Ask before sending original documents anywhere.

Requests to Admit

Requests to admit ask a party to admit or deny specific facts or the authenticity of documents. In Illinois, requests to admit are governed by Illinois Supreme Court Rule 216. These requests are designed to narrow the issues in dispute prior to a trial. For example, a party may be asked to admit that a bank statement is genuine, that a certain debt exists, or that a particular event occurred on a certain date.

Why they matter: If a fact is admitted, the other side may not need to spend time proving it at trial. In Illinois, an unanswered request to admit can be deemed admitted, which can have major consequences and impact the outcome of your case. These requests should always be reviewed carefully with counsel and answered on time.

Oral Discovery

Oral discovery in Illinois usually refers to depositions. A deposition is a formal question-and-answer session in which a witness or party gives sworn testimony outside the courtroom, usually in the presence of attorneys and a court reporter. In some cases, a deposition may also be recorded by video. Illinois depositions are addressed in Illinois Supreme Court Rules 202 through 208. The testimony can be used to gather information, assess credibility, preserve testimony, and prepare for settlement, hearing, or trial.

Depositions

During a deposition, the other attorney may ask detailed questions about finances, property, parenting, communications, health issues that are relevant to the case, or other disputed facts. Because you are under oath, your answers have the same weight as if you were taking the stand to testify in court. A deposition is not a casual conversation. It is part of the formal legal process.

What to expect:

• You will be sworn in before questioning begins.
• Your attorney may prepare you beforehand and may make objections during the deposition.
• You must listen carefully and answer the question asked.
• If you do not understand a question, it is appropriate to say so.
• If you do not know or do not remember, say that truthfully rather than guessing.
• There may be breaks, but you should follow your attorney's guidance about when and how to take them.

Tips for a successful deposition:

• Tell the truth.
• Answer only the question asked.
• Do not volunteer extra information.
• Stay calm, even if the question feels unfair or repetitive.
• Pause before answering so you have time to think and your attorney has time to object if needed.
• Review important documents with your attorney ahead of time.
• Do not try to outsmart the process. Clear and honest testimony is usually the best testimony.

Subpoenas and Third-Party Records

Sometimes important information is held by someone who is not a party to the case, such as an employer, bank, school, medical provider, or business. In those situations, attorneys may use subpoenas to request records or testimony from third parties when permitted by Illinois law and court rules. Subpoenas typically include a request for someone to appear for a deposition, or to provide documents in lieu of being deposed. Subpoenas can be especially useful when a party believes information is missing, incomplete, or inaccurate, and is unable to obtain the information from the other party. In Illinois practice, subpoenas are governed by the discovery rules on depositions and third-party records, and local court procedures may affect notice and compliance requirements.

Illinois Financial Affidavits and Mandatory Disclosure

In most Illinois family law cases involving support, maintenance, attorney's fees, or other financial issues, a party may be required to complete the statewide Financial Affidavit and provide supporting documents such as pay stubs, tax returns, and bank statements. Accuracy matters. The Illinois statewide form itself warns that inaccurate or misleading information may lead to penalties. In practice, the Financial Affidavit often works together with formal discovery requests, so clients should expect to gather the same core financial records early and keep them updated.

In Cook County Domestic Relations matters, additional mandatory disclosure and proof-of-income requirements may apply under local rules and standing orders. Judges may also require updated financial information before pretrial conferences, temporary hearings, or trial. That means clients should not assume one document production is enough for the entire case.

What Clients Should Do Right Away

• Make a list of all banks, credit cards, loans, employers, retirement accounts, and major assets.
• Begin collecting recent financial records as soon as your case starts.
• Save relevant emails, texts, and other communications.
• Use one folder system, digital or paper, to stay organized.
• Tell your attorney about unusual facts early, especially if you are worried about them.
• Review deadlines carefully and respond promptly to requests from your legal team.
• Ask questions when you do not understand what is being requested.

Common Mistakes to Avoid

• Ignoring discovery requests or waiting until the last minute
• Giving incomplete answers
• Guessing instead of verifying facts
• Leaving out accounts, debts, or documents
• Deleting messages or records after the case begins
• Assuming informal explanations are enough without documentation
• Speaking casually at a deposition as though it is off the record