How to create a telegram bot for a client only?

Question

Bots

The bot receives applications from the site. I understand how to create a bot on my phone.
How to create a bot (or give the opportunity to go there) to another person (client), for whom I send an application from the form?

Answer 1

In Telegram, you cannot prevent users from writing to a bot. It is possible in the bot's program logic to check which account it is being accessed from, and respond only according to the white list.