If you can't remember your password, go to www.iptorrents.com and press on Lost Password.
Fill the fields with the email you used on your IPT account and type the security code.
You will receive an email from IPT:

Click on the first link in that email (NOT the one that ends in recover.php).
Then, you will be sent to a page like this one:

Follow the instructions on that page to complete the process.
If you can't remember your email address, then email us at ipthelp@protonmail.com and provide the following info about your account :
1. Username
2. Ratio
3. When did you create the account?
4. How many GB have you uploaded?
5. How many GB have you downloaded?
6. How many invites did you send?
7. How many invites do you have left?
8. Email address used to create the account?
9. What's the last IP address you've logged in on IPT from?
10. Your passkey (if you're still leeching/seeding torrents from IPT, use one of them to get the passkey)
11. How many times (if any) have you donated to the site and how much was the last donation amount?