What impact does the receiving party's cohabitation with a new partner have on spousal support in California?

In California, when the party receiving spousal support begins cohabitating with a new partner, it creates a legal presumption that their need for support has decreased. This allows the paying spouse to ask the court to reduce or terminate the support payments. Here is how to request a modification of spousal support based on cohabitation: Step 1: Gather Evidence of Cohabitation You must collect proof that your ex-spouse is living with a new partner in a romantic, marriage-like relationship. This is more than just having a roommate. Evidence can include dated photos, social media posts showing a shared life, mail addressed to both individuals at the same address, or statements from witnesses who can confirm they live together. Step 2: File a Request for Order Complete and file a Request for Order (Form FL-300) with the superior court that handled your divorce. On this form, you will clearly state that you are asking to modify or terminate spousal support because the receiving party is cohabitating, which creates a presumption of a decreased need for support under California Family Code Section 4323. Step 3: Complete and File Your Financial Forms You must also fill out a current Income and Expense Declaration (Form FL-150). This provides the court with your updated financial information. You can find these forms on the California Courts website. Step 4: Formally Notify the Other Party You must have a third party (not you) who is over 18 "serve" your ex-spouse with copies of the filed court forms. After service is complete, the server must fill out and file a Proof of Service form with the court to show that the other party was properly notified. Step 5: Prepare for and Attend the Hearing The court will set a hearing date. At the hearing, you will present your evidence of cohabitation. The burden then shifts to your ex-spouse to prove that despite cohabitating, their financial need for spousal support has not changed. The judge will listen to both sides and make a decision. Important details and nuances: Cohabitation does not automatically end spousal support like remarriage does. It only creates a "rebuttable presumption," meaning the receiving spouse has a chance to prove they still need support. The court will consider the new partner's financial contributions to the household expenses when deciding whether to reduce support. Warnings and limitations: Proving cohabitation can be challenging and may require significant evidence. Simply showing that your ex-spouse has a new partner is not enough; you must demonstrate that they are living together and sharing expenses. A judge has the final discretion to decide whether to change the support order and by how much. This is general information and does not constitute legal advice. For complex situations, especially those involving proving cohabitation, consult with a qualified California attorney.