Any 8 or 9 digit UPI Number that has been disabled/ deleted by a user will be kept under a cooling period of 6 months. After 6 months this number can be claimed by any other user. However, in case a 10 digit mobile number has been used to create the UPI number then, even if the user deletes it, no other user will be able to claim it. Note: you can only create a 10 Digit UPI number with your mobile number and no other number