A suspicion that will not go away wears a person down more than an unpleasant certainty. Almost everyone who calls us about this says the same sentence: “I can’t live with not knowing any more.” This article sorts out which signs actually mean something, which steps make sense — and which ones you should avoid, because they are criminal offences or make the situation worse.

What is genuinely telling

Isolated changes in behaviour mean little. What becomes meaningful is a pattern that touches several areas at once and persists over weeks. The most commonly described: new, unverifiable appointments at unusual hours; a phone that suddenly goes everywhere and lies face down; implausibly detailed explanations for trivial things; withdrawal from shared routines alongside a new focus on appearance; spending that cannot be matched to anything; and the reversal — sudden accusations directed at you where there were none before.

And the counter-check, which matters just as much: every one of those points has a harmless explanation. Pressure at work, illness, money worries or a depressive episode produce a very similar picture. The leap from a feeling to a conclusion is the mistake that costs most relationships — not the truth itself.

What not to do

Do not go into your partner’s phone, email account or messages. Unauthorised access to data is a criminal offence in Germany, as is secretly recording conversations and attaching GPS trackers to someone else’s vehicle. Such “evidence” is worthless in court and reverses the roles: the person who was deceived becomes the accused.

Avoid setting traps and confrontations in the middle of the night as well. Neither produces clarity, only escalation — and both take away your ability to decide calmly what you actually want.

The two routes to clarity

Facts. Surveillance documents what actually happens in public space — lawfully, with time, place and imagery, and without interpretation. It answers the question about behaviour. The relevant service: infidelity investigation.

Statements. A polygraph examination answers the other question: is the person telling the truth when they deny it. In many cases this is the faster and gentler route — especially when both sides want the matter settled. Not infrequently the initiative comes from the accused partner, who wants the suspicion gone. For a first, uncomplicated assessment VerifEye is often enough; our article explains how a full examination runs.

Voluntariness is essential: nobody can be obliged to take a test, not even within a relationship. An examination against the other person’s will is excluded — and would be worthless anyway.

Before you decide: what will you do with the answer?

We put this uncomfortable question to everyone at the first consultation. Some people need certainty in order to leave. Others need it in order to stay without distrusting themselves. Both are legitimate. What is not legitimate — and destructive in the long run — is the third variant: seeking certainty in order to exert control. If you notice that the suspicion is running your days and affecting your sleep and your work, a conversation with a couples or individual counsellor is a more effective first step than any investigation.

Confidentiality

Enquiries of this kind are handled in strict confidence. The assignment and the result go to nobody but you, records are kept only for the agreed period, and we will say honestly when there is no solid basis for an investigation at all. A reputable agency does not sell you field days to confirm a feeling.

Frequently asked questions

How long does a case like this take? Surveillance usually produces a reliable picture over three to five days in the field; a polygraph examination takes a single appointment.

What does it cost? The test is the cheaper option and has a fixed price; surveillance is billed by the hour. The online calculator gives an indication.

Can I use the results in divorce proceedings? That depends on the proceedings and belongs in a conversation with a lawyer. This text is not legal advice.

Will my partner learn that I engaged you? With surveillance, no. With a test, naturally yes, since it requires the consent of both.

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