The main point in such stories is that deception or fraud occurs exclusively through abuse of trust, which attackers can establish for a long period.

The word trust is the key word, since the deceived independently and solely of their own free will carry out actions to alienate their high-value property.

Details on the link https://www.vesti.ru/television/article/2600524

The complexity of such a category of cases lies in establishing the moment associated with the abuse of trust.

Law enforcement agencies in such cases pay special attention to the search for victims in similar circumstances, which in the future will indicate the mercenary intent of the committed acts.
Understanding how to protect yourself and your loved ones from the criminal actions of such persons comes from the basic principle of their work, which literally sounds like:

“If you want to take first give,” therefore, always with extreme caution accept any signs of attention or plausible actions from unfamiliar persons, thereby letting them into your life.