AuthorJennifer Duncan-Brice
Def‌ined: Interrogatories are written questions directed to a party requesting that party to provide sworn answers to
the questions.
Scope of Chapter: General principles and techniques about interrogatories; how to propound interrogatories; how
to respond, including both answering and objecting; supplemental and amended answers; motion practice related to
interrogatories; and evidence issues.
Strategic Considerations:
Propounder: Draft interrogatories that identify the requested information with reasonable particularity. Use Def‌initions
and Instructions sections to make the interrogatories more concise, effective, clearer, and less objectionable.
Respondent: Work with the client to compile the responsive information. To avoid waiving objections to the interrog-
atories, timely serve a written response asserting all the objections you want to preserve. If the interrogatories seek
conf‌idential information, propose the parties enter into a Conf‌identiality Agreement, or stipulate to a protective order.
Statutes and Rules:
SCR 201(b) (permissible scope of discovery).
SCR 201(c) (protective orders).
SCR 201(d) (time to serve interrogatories).
SCR 213(a) (service of interrogatories).
SCR 213(c) (limit on number or sets of interrogatories).
SCR 213(d) (answers and objections).
SCR 213(f) (disclosure of witnesses and testimony).
SCR 213(g) (limitation on testimony and freedom to cross-examine)
SCR 213(h) (use of interrogatories).
SCR 213(i) (amending answers).
SCR 219(a) (motion to compel discovery).
SCR 219(c) (failure to comply with discovery order).
Related Topics: All Discovery, Ch 20; Requests for Admissions, Ch 26; Production of Documents and Other Things,
Ch 22; Discovery Disputes, Ch 27; Depositions, Ch 23; Presuit Activities, Ch 2.
Forms: See digital access for the following forms:
Form 25:10, Standard Personal Injury Interrogatories.
Form 20:30, Stipulated Protective Order.
Form 20:40, Acknowledgment of Stipulated Protective Order.
Illinois Pretrial Practice 25-2
§25:01 Basic Principles
§25:02 Advantages
§25:03 Disadvantages
§25:04 Propounded by Parties, on Parties
§25:05 Who Are “Parties”?
§25:06 Non-Individual Entities
§25:07 Answers Binding at Trial
§25:08 Limit on Number
§25:09 Duty to Supplement
§25:10 Uniform Interrogatories
A. General Points
§25:20 Goals and Purposes
§25:21 Strategy and Tactics
B. Using Interrogatories With Other Discovery
§25:30 With Depositions
§25:31 With Document Requests
§25:32 With Requests for Admissions
§25:33 When to Delay Interrogatories
C. Types of Interrogatories
§25:40 Contention Inquiries
§25:41 “Source-of-Information” Inquiries
§25:42 “Should-Have-Done” Inquiries
§25:43 Expert Opinion Inquiries
§25:44 Damage Inquiries
A. Format
§25:50 Caption
§25:51 Title
§25:52 No Blank Space for Response
§25:53 Numbering
§25:54 Signature
§25:55 Service
B. Preliminary Parts
§25:60 Introductory Statement
§25:61 Instructions
§25:62 Def‌initions
§25:63 Applicable Time Period
§25:64 Basis for Claim of Privilege
C. Draf ting Techniques
§25:70 Elements of Good Interrogatories
§25:71 Be Precise and Meticulous
§25:72 Be Simple and Direct
§25:73 Unnecessary Document “Identif‌ication”
§25:74 Don’t Seek Lengthy Narrative
§25:75 Break It Down
§25:76 Force “Yes” or “No” Response
§25:77 Subparts
§25:78 Quote Language at Issue
§25:79 No Legal Opinions
§25:80 Dealing With “Artful Dodgers”
25-3 Interrogatories
D. Areas of Inquiry
1. General Points
§25:90 Scope of Inquiry
§25:91 How to Identify Areas
§25:92 Element of Surprise
§25:93 People With Relevant Knowledge
§25:94 People Who Contributed to Answers
2. Facts
§25:100 Supporting Claims or Defenses
§25:101 Collateral Facts
§25:102 Party Admissions
§25:103 Damages
§25:104 Criminal Convictions
§25:105 Insurance Coverage
3. Identit y and Testimony of Witnesses
a. General Points
§25:110 Disclosure of Identities and Addresses of All Witnesses
§25:111 Disclosure of Testimony
§25:112 Materials Relied On
b. Lay Witnesses
§25:120 Def‌ined
§25:121 Disclosure Requirements
c. Independent Experts
§25:130 Def‌ined
§25:131 Disclosure Requirements
d. Controlled Exper ts
§25:140 Def‌ined
§25:141 Disclosure Requirements
§25:142 Calculation of Damages
§25:143 Consultants (Non-Testifying Experts)
e. Reports of Controlled Experts
§25:150 Requirement
§25:151 Scope of Request
§25:152 Future and Supplemental Reports
§25:153 Unwritten Reports
§25:154 Costs
4. Documents
§25:160 Authority
§25:161 Purpose
§25:162 Cost of Copying
§25:163 Dealing With a Documents Response
E. Service
§25:170 No Filing
§25:171 Serving Respondent
§25:172 Serving Parties Other Than Respondent
§25:173 Certif‌icate of Service
§25:174 Earliest Time to Serve
§25:175 Latest Time to Serve
A. General Points
§25:180 Checklist
§25:181 Evaluate Interrogatories
§25:182 Work With Client
§25:183 Duty to Gather Information
§25:184 Look for Conf‌idential Information

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