Formal discovery in a California divorce can include more than exchanging written questions and financial documents. In cases where important facts are disputed or additional information is needed, a party may use an oral deposition.

A deposition involves questioning a person under oath before trial. The person being questioned may be one of the spouses, another individual with relevant knowledge, or an expert witness. Depositions can be useful because they allow information to be explored in greater detail than written discovery often permits.

Why Are Depositions Used?

The source materials identify several primary purposes for an oral deposition.

First, a deposition can be used to learn relevant information about the case. Questions can follow up on documents, financial transactions, property issues, or other matters requiring clarification.

Second, a deposition can establish the witness’s position before trial. Because the testimony is given under oath, the witness’s deposition testimony may become important if that person later gives inconsistent testimony in court.

Third, the deposition provides an opportunity to evaluate the witness. Hearing how someone explains an issue can provide information that may not be apparent from written discovery responses.

Who Can Be Deposed?

An oral deposition can generally be taken of anyone, including a party to the family law case.

Depositions may also be used with expert witnesses. For example, when an expert is expected to testify at trial, the deposition can be used to understand the opinions the expert intends to give and the basis for those opinions.

Expert depositions can be especially important in divorces involving complicated financial, valuation, or other specialized issues.

The source materials explain that one common purpose of an expert deposition is to “lock in” the expert’s opinions so the parties understand the testimony expected at trial.

How Are Depositions Different From Written Discovery?

Interrogatories provide written answers to written questions. A deposition is different because questioning occurs orally and can develop as the testimony progresses.

If an answer raises another question, additional questions can generally be asked immediately. That flexibility can make depositions particularly useful for complicated factual issues.

Depositions can also be more expensive than many other discovery methods. For that reason, they may be used selectively when the information sought justifies the additional time and expense.

Preparation Matters Before Giving Testimony

A deposition is part of the litigation process, not an informal conversation between the parties.

Because the witness is giving sworn testimony, careful preparation is important. Relevant documents, prior discovery responses, financial records, and the issues likely to be discussed may need to be reviewed beforehand.

A deposition can influence how the parties evaluate disputed facts and prepare for trial, making it an important discovery tool in California family law cases where significant factual questions remain unresolved.