Magnum Investigations helps people in Melbourne and across Victoria find out whether their partner is cheating. A Melbourne investigator follows your partner discreetly and records where they go and who they meet. You get a written report with times, photos and video. Surveillance is $120 + GST per hour. Every job starts with a 4-hour block at $1,100 + GST, which covers travel time, km, admin and average expenses.
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When the story stops adding up
It might be a partner who’s suddenly “flat out” at work, a new friend nobody has met, or weekends that keep getting booked up. You’ve asked, and the answers don’t sit right. Living with that doubt is draining.
Our job is to swap the doubt for facts. Sometimes that means good news. Sometimes it means proof. Either way, you get to make your next move knowing the truth.
Signs our Melbourne clients mention
- Late finishes in the CBD, or after-work drinks that turn into whole evenings
- A phone that’s always on silent, face down or deleted clean
- New clothes, a new gym, or a sudden interest in looking good
- Trips down the coast or “work conferences” that can’t be checked
- Withdrawals, transfers or receipts that don’t match the story
How it works
- Have a confidential chat. Call or message us. Tell us what’s been happening. No pressure to book.
- Choose the timing. We work out with you when your partner is most likely to meet someone, so your money goes into the right hours.
- Book it in. Pay the first 4-hour block and we assign an investigator. We’ll need a photo, the car and where your partner will start from.
- Surveillance. Our investigator follows from a distance in an unmarked car, through Melbourne traffic, on the freeways and out to regional Victoria if needed.
- Your report. When the balance is paid, you receive a report with times, places, photos and video.
What your report includes
- A time-stamped record of every stop and every person your partner met
- Photos and video taken from public places
- A simple layout that you, or your lawyer, can follow easily
- Updates during the job if you’d like them
What it costs
- $120 + GST per hour of surveillance.
- First 4-hour block: $1,100 + GST. Travel time, km, admin and average expenses are included.
- Each extra hour: $120 + GST, so the investigator can keep following if your partner moves on.
What our clients say
★★★★★
“Handled a sensitive situation with complete confidentiality and professionalism.”
Patience C, Google review
★★★★★
“Very discreet and fast! Got me the information I wanted within 24hours. Highly recommended!”
Daniel G, Google review
★★★★★
“Prompt service, professional staff. Highly recommend Magnum”
Kristen H, Google review
Melbourne and Victoria areas we cover
Melbourne CBD, Southbank, Docklands, St Kilda, Richmond, the bayside suburbs, the eastern and western suburbs, the Mornington Peninsula, Geelong, Ballarat, Bendigo and the rest of Victoria.
Why Magnum Investigations
- Melbourne-based. Investigators who know Melbourne’s suburbs, freeways and back streets.
- Experienced. Over 30 years of combined investigation experience.
- Upfront prices. Shown on this page, with no surprise extras.
- Discreet. Unmarked cars, and your partner is never contacted.
Cheating partner investigations in Melbourne: FAQs
How much does a private investigator cost in Melbourne for a cheating partner?
Surveillance is $120 + GST per hour. Every job starts with a 4-hour block at $1,100 + GST, which covers travel time, km, admin and average expenses. Extra hours are $120 + GST each.
Is it legal to hire a private investigator to follow my partner in Victoria?
Yes. It’s legal to hire a private investigator in Victoria. Our investigators watch from public places and work within the law.
Do you cover Geelong and regional Victoria?
Yes. We cover Geelong, Ballarat, Bendigo and regional Victoria as well as Melbourne. If your partner travels, the investigator can follow.
Will my partner realise they’re being followed?
Our investigators use unmarked cars and stay well back. If they think they’ve been noticed, they pull out rather than risk it. We never contact your partner.
How fast can you start?
Call us any time. Once the job is booked and paid, we arrange an investigator for the day and time you choose.
How many days do most cases take?
With the right timing, many cases are answered in one or two days. If your partner’s routine is unpredictable, it can take longer. We’ll plan it with you first.
What if nothing happens on the day?
You still get a full report of where your partner went. For many clients that’s a huge relief. If you’re still worried, we can help pick a better day.
Can the report help with a separation?
Australia has no-fault divorce, so an affair doesn’t change how property is divided. Evidence can still matter in some parenting matters, like who is living in the home with your children. Our reports are dated, timed and clear for your lawyer. Ask your lawyer about your own situation.
What do you need from me?
A recent photo, the car and number plate, the starting address, and the day and time you’re worried about.
Is my enquiry private?
Yes. Your details are never shared, and your partner is never contacted.
Speak to a Melbourne investigator
Confidential, no pressure, and you can call any time.