To find out who's account it is on Cash App, you can try the following methods:

1. Look for their $Cashtag: Cash App users create a unique identifier called $Cashtag, which is usually their username on other platforms. If you know the person's $Cashtag, you can search for it on Cash App to find their account [1].

2. Contact Cash App Support: Reach out to Cash App's customer support and explain the situation. Provide them with the account details, and they should be able to assist you in identifying the account owner [2].

3. Request Information from the Account Holder: If you have a legitimate reason to know the account owner, you can directly reach out to them and ask for their identification. Remember to approach the situation respectfully and provide a clear explanation for your request [2].

4. Seek Legal Assistance: In certain cases, such as fraudulent activities or legal disputes, it may be necessary to involve legal professionals. They can guide you through the legal process and help in obtaining the necessary information from Cash App [2].

5. Contact Your Bank: If you have made a transaction with the Cash App account in question, you can also contact your bank for assistance. They may be able to provide you with information about the recipient [2].

6. Social Media Investigation: Try searching for the account holder on various social media platforms using their username or associated phone number. People often link their Cash App accounts to social media profiles, which can help you identify the owner [2].

7. Online Search: Conduct a thorough online search using the account holder's username or any other identifiable information. This may lead you to public records, social media profiles, or other online platforms providing information about the individual [2].

8. Use Reverse Phone Lookup Services: If you have the phone number associated with the Cash App account, you can use a reverse phone lookup service to gather information about the owner. These services can provide details such as the name, address, and social media profiles linked to the phone number [2].

9. Report to Law Enforcement: If you suspect any fraudulent activity or believe the account to be involved in illegal practices, it is essential to report your concerns to law enforcement. They will have the resources to investigate the account and determine the owner's identity [2].

Learn more:

1. How do I find out who's account it is on Cash App? - Quora
2. How to Find Out Who Owns a Cash App Account | INVESTOR TIMES
3. Account Settings