A simple tutorial in which you learn how to disable Safari AutoFill Contacts. Thus, when you have to complete data in a web form, you will no longer receive suggestions with the contacts in the agenda (the app Contacts).
First of all let's see briefly what is it AutoFill For the web browser and what it helps.
Autofill web forms is a function that allows the browser to Automatically complete the data entry forms or fields with previously saved information. This feature is designed to save the user's time and to facilitate the repetitive introduction of personal information or other details in online forms.
For example, AutoFill It is very useful when completing a registration form on an online website or store. The browser can provide you with suggestions on previously saved information such as: name, email address, delivery address and phone number.
Also in Autofill options for safari you can add bank cards. Thus, when you have to make an online payment, the bank card data can be completed automatically.
However, I do not know why the Safari browser often brings contacts in self-compliance suggestions, and the simplest solution to get rid of this problem is to disable autofill contacts for macos.
How do you disable Safari Autofill Contacts
Go to safari settings (Settings) then to the tab “AutoFill” Disable option: “Using information from my contacts“.

Related: Top 5 advantages of safari use on Apple devices (Mac, iPhone and iPad)
Once this option is deactivated, when you have to plot web forms, information will not be made from contacts.