After adding a new contact in the instant messaging service, you found that instead of a person, you were answered by an automaton that requires you to answer a simple question to make sure that you are not a spam robot. What is the answer to the automaton?
If you were asked to enter the result of a mathematical action or answer a simple quiz question, do so. For example, to the question "How much is 32 + 16" answer "48" (without quotes), and to the question "An animal with four legs, eats sour cream, purrs" answer "cat" (also without quotes).
If the machine asks you to follow the link, look at the picture located there, and then enter letters or numbers from it, be careful. Make sure the link is actually an image and not an executable file. If there is a program there (both for the computer and for the phone), do not run it under any circumstances - it may be malicious. If there is indeed a picture, enter the combination of numbers and letters located on it, and you will be authorized. Sometimes, instead of a link, a request appears to read the letters and numbers located on the avatar of the interlocutor - this method is safer, since you do not have to download files of unknown origin. In most clients, to enlarge an avatar, you just need to move the mouse arrow to it without clicking anything.
If you receive a request to send an SMS to a particular number to receive an access code, do not give in - the person you want to add to your contact list does not have antispam, but a virus. Do not give in if you receive a request to enter your phone number, receive an SMS message and indicate the code indicated in it - this service can also be paid. Warn the person about the presence of a virus on his computer in another way - by phone, e-mail. Let him check his machine with antivirus software, change the password, and then try adding it again.
Do not give in if you did not add someone to your contact list, but on the contrary, an unknown person added you and immediately asked to use the SMS service, allegedly to unblock it. Most likely, this is definitely a spammer. Real antispam does not check contacts added by its owner on its own initiative.