Usually yes if you're part of the conversation — but not everywhere, and almost never if you're recording a call or reading messages you're not part of. It comes down to your state's consent rule and how you record.
What the consent rule actually means
Every state falls into one of two camps for recording a private conversation:
One-party consent — as long as one person in the conversation agrees to the recording, it's legal. If you're in the conversation, you are that one party, so you can record your own talk with your spouse.
All-party consent (sometimes called two-party) — everyone being recorded has to consent. Recording your spouse secretly, even in a conversation you're part of, can be a crime here.
The catch that trips people up: this protects private conversations. A phone call your spouse is on but you are not is their private conversation — recording it is a different, much more serious act than recording your own.
What to watch out for
Installing spyware or a "phone monitor" on your spouse's device, or logging into their email or texts, can violate federal law (the Wiretap Act, Stored Communications Act, and Computer Fraud and Abuse Act) no matter what your state's consent rule says. Shared family accounts are a gray area; their personal device is not.
Putting a recorder on the house line to capture your spouse's calls with someone else is illegal in most states — one-party or not — because you aren't a party to those calls.
"Is it legal to make?" and "will a judge let me use it?" are two different questions. An illegally made recording is often thrown out — and can expose you to criminal or civil liability. Check the "holds up in court?" line above for your state before you rely on anything.
What a licensed investigator can legally do
This is where a professional matters. A licensed private investigator works inside these same laws — but knows exactly where the lines are, and how to document what's true in a way that actually holds up:
- Surveillance and photography in public places, where there's no reasonable expectation of privacy.
- Documenting patterns — where someone goes, who they meet — without illegal recording or hacking.
- Evidence gathered and logged the way courts expect, so it isn't thrown out on a technicality.
What they won't do — because it's illegal for anyone — is tap a phone, plant spyware, or break into accounts. If someone offers to, that's a red flag.
Get this handled the right way
Know what's legal where you are, then connect with a licensed investigator who can document it so it counts.
Start a caseGeneral legal information only, not legal advice. No attorney–client or investigator relationship is created by reading this.
This guide is general legal information, not legal advice, and laws change. Recording, monitoring, and surveillance laws carry real criminal and civil penalties. Confirm the current law for your state at the official code and consult a licensed attorney before recording anyone.