What forms of address proof can I provide for my son's DTV application if his bank account has less than 500,000 TBH?

I have a quick question: I am applying for a DTV for my 13 yr old son and they are requesting proof of his current address. What I have available at the moment is a bankstatement which has his and my name on it with the address however, the account is his, therefore he does not have 500,000 TBH which is plain to see, because I purposely do not give more than $1,000 due to his age. I have separately attached financial proof of support from me to him, which is well over the minimum requirement.

My question is if anyone knows or thinks that the application will be denied because his bank has less than 500k TBH. Or, should I just think of another form or address proof for him, or, should I crop only the part of the bankstatement that has his proof of address? But would cropping a bank statement adulterate the proof?

Any thoughts on this will be helpful since I want to get it right the first time.

Thanks in advance