To keep your security deposit, your landlord must submit a Security Deposit Claim Form to the Residential Tenancies Tribunal. A Residential Tenancies Officer will examine this form and review evidence provided by both the landlord and tenant to determine how much the landlord can claim. The Residential Tenancies Tribunal should make a decision within 45 days, after which it can be appealed. A cheque will be mailed by Service New Brunswick if there was no appeal or if an appeal has failed.