Generally it is a requirement that a probationer keep their probation officer informed as to the place of their residence. Failure to do so is a technical violation. In addition, there is requirement to report a new arrest within 48 hours. While a technical violation of probation can be punished by two years in prison, a good lawyer can point out all of the good things your brother has done in mitigation of the violations and argue to have him reinstated to probation. Family support is always strong argument with the court. It shows there is network to help he will not reoffends.
Answering this questioin does not constitute an attorney client relationship with the Law Offices of Eric A. Ballinger or its attorneys. You should consult an attorney in your jurisdiction and familiar with the courts in your venue.