> [!info] > Input: [[Login|login (phone number, email address)]] > Output: [[If Account Registered|confirmation of existing account]], [[Access Recovery Information|parts of email addresses/phone numbers/names]] > > Types: [[Technical Weakness|technical]] > Weakness: [[SOWEL-1. Having and Filling Account]] ### Explanation Process of registration of a new account in platforms is designed in a way that only one person could use it, and it's impossible to register twice on the same account. Try to register on the phone number or email address of the person to get message "Account is registered". Disclaimer: be careful cause it cound send SMS or message to an account owner. ### Examples {{some links to articles, videos, etc}} ### Tools - [holehe](https://github.com/megadose/holehe) - checks many platforms by email address by various methods including registration method (112 checks, ≈30 are working stable as for April 2024) - [ignorant](https://github.com/megadose/ignorant) - checks Instagram by phone number using the explained method ### See also - {{internal links to similar techniques}}