Deposit Request Approval System Implementation

Thought quite simple but a bit confusing I was implementing third-party deposit system. There will be two roles for example

• Admin
• User When the user make deposit the might need to fill the form with payments info such as (Billing address, phone, transaction ID, with recipe) Once the user submitted a form, the Admin can be verify wether the actual payment have been received or not and make sure to check the important info such TrxID. Then approved (signed with the admin id) => system will automatically add funds to the user account. The things is let just say we got 1K deposit request. What would happen if 2 or more admin tried to verify and approved for the same user's request? Will there be a conflict? How should I solve it? Let me know if you have other prepestive for this implementation.