I think the guy she is seeing has had a vasectomy, will CheckMate still work for me?

Semen and sperm are two different things. Semen is the vessel in which sperm travels. A vasectomy eliminates the sperm but semen production remains normal.

Will this test kit work if the woman uses a condom?

Condoms are designed to keep semen out of a woman's body not off of it. People also use condoms much less frequently than the media wants you to believe. Think about it, have you ever known anyone who actually liked using a condom during sexual intercourse?  Besides, all you have to do is think about anytime you have had sex using a condom to know that the chances of semen being present after sex are very good due to what we call  "outercourse".  

What's the first thing a guy does after having intercourse using a condom? He removes the condom of course. Then there is usually some time of hugging activity that takes place and usually   the guy is actually laying directly on top of her at some point. It is during this "Outercourse" that semen is deposited onto the woman's body. 

If it is an illicit affair and the woman in question doesn't have the proper amount of time to get thoroughly cleaned up, the chances are very good that semen stains may be present on different areas of the inside of her clothing. Many men have reported finding traces of semen on the insides of shirts and blouse's in the stomach area.  Just be creative in your search!

This is an actual question we get all the time...
I was looking at your semen detection kit and had a couple questions. I would buy the kit to check on my wife but what happens if a woman doesn't have sex, but during the day she has some... how do I say this... like erotic day dream, and a little of her own semen goes into her underpants?

Only men have semen. The enzyme that CheckMate detects is produced by the male Prostate gland and found in a mans semen at very elevated levels. 

There is this weird stain on the seat in her car. Can I test the stain without doing any damage?

Absolutely. CheckMate is the only product of it's kind that is designed specifically for the home user and does not stain or damage the material being tested.

What is the 5 Minute Infidelity Test ?
The CheckMate 5 Minute Infidelity Test™ is the only product of its kind in America today. Designed specifically for  home use, The 5 Minute Infidelity Test  works by detecting traces of semen that remain present in undergarments after sex. "If they did it, it's there."  

How does it work?
The Checkmate 5 Minute Infidelity Test  is specially formulated to detect certain enzymes  produced by the male prostate gland and found in a  mans semen. 
                                                

Will the test damage or stain the material being tested?
No. Only the CheckMate 5 Minute Infidelity Test  is designed specifically  for the home user and leaves no traces of the test procedure on the suspect article.  You do the test and only you know the results!
                                                

What if the material is white and I can't see a stain?
The CheckMate 5 Minute Infidelity Test  is designed to uncover and identify even completely invisible traces of semen that may be locked into the fibers of the suspect article. CheckMate works on any type or color of material!
                                                   

Can I get a false positive test result?
Absolutely not! CheckMate designed specifically  for use by  the everyday consumer and is the only "Semen Specific" test kit available today that actually distinguishes between semen and other bodily fluids. CheckMate also comes with  complete easy to follow instructions that assure completely accurate test results. 
                                                    

How long can semen stains remain present?
Semen stains can remain present on unwashed material for very long periods of time. Traces of semen remaining  locked into the fibers of unwashed garments for  periods of 12 months or more is very common.  

Even though most people are only concerned with testing items that are thought to have recently been soiled, laboratory tests have even revealed traces of semen on fabric over 40 years old! Of course, after being laundered all traces of semen will be removed from the garment, so you must obtain the suspect article and perform the test before  anyone has the opportunity to wash it. 

Typical Scenario: Your wife gets off work at five o'clock and usually gets home around six. It's Friday night and for some reason, today she doesn't come home on time. Now it's nine o'clock, then ten, no call, no nothing. Then, at 2:30 a.m she finally comes home and goes to bed. 

This incident is indicative of a general decline in your relationship and because you rarely have sexual relations together anymore, the first thing that would come to any man's mind under these circumstances is that she might have been out with some other guy and possibly had sex. To find out for sure all you need to do is simply obtain the underwear she was wearing when she came home and do the CheckMate test. It's that simple and if the results are positive there's absolutely no way out of it.  

I'm a man and I want to  test my woman friend. Won't I detect  myself?
Absolutely not! Just follow the easy instructions. For a man who wants to test a woman you must abstain from having intercourse with the woman you want to test for the recommended time period outlined in the instructions. Every situation is different but abstaining from sexual relations with the woman you want to test is usually not a factor. Given the current conditions and circumstances of the relationship that have led to purchasing and using the CheckMate test kit, the couple in question is usually not engaging in regular sexual activity together anyway so this is typically not  a problem.