3 in 5 rent increases reviewed by Threshold in quarter two of this year were invalid.
Almost 200 people contacted the homeless charity every day between April and June of this year, with the majority of queries relating to rent increases and eviction notices.
The charity found 60% of rent increases, and over half of the tenancy termination notices created, were invalid.
Policy Officer at Threshold, Anne Maire O'Reilly, is appealing to tenants to get their rent increases reviewed.