Several rental properties have been repossessed without an explicit reason given in Ceredigion, Powys and Gwynedd since the UK Government pledged to ban no-fault evictions in 2019, new figures show.
Shelter said hundreds of families "risk being thrown into homelessness every day" while the practice remains legal.
The government published the Renters Reform Bill in May, but it is yet to pass through Parliament, and Shelter has urged the Conservatives to prioritise the Bill and protect renters across the country.
The latest Ministry of Justice figures show seven repossessions were made through 'accelerated possession orders' in Ceredigion, eight in Powys and 14 in Gwynedd since the beginning of April 2019.
Of them, three in Ceredigion were completed in the year to June – while there were none in the year before. For Powys there were two, down from three the previous year. And in Gwynedd there were seven, up from three the year before.
An accelerated possession order means the landlord served a Section 21 eviction and the tenant must vacate the property within two months. The landlord does not have to provide a reason.
These 'no-fault' evictions have accounted for 22,440 repossessions across Wales and England since April 2019, when the government pledged to ban them in its election manifesto.
Meanwhile, there were 47 per cent more Section 21 notices served in the three months to June than in the same period last year.
Polly Neate, chief executive of Shelter, said landlords can "too easily use and abuse the current system", hiking up rents and issuing a Section 21 eviction notice if the tenant cannot pay.
Ms Neate said: "With private rents reaching record highs and no-fault evictions continuing to rise, hundreds of families risk being thrown into homelessness every day.
"We speak to renters all the time who feel like they have zero control over their own lives because the threat of eviction is constantly hanging over them.
"The Renters Reform Bill will make renting more secure, and for those who live in fear of the bailiffs knocking at their door, these changes can’t come soon enough.
"The moment Parliament resumes, the government must get rid of 'no-fault' evictions, which have made the prospect of a stable home little more than a fantasy for England’s 11 million private renters."
The Department for Levelling Up, Housing and Communities said its Renters Reform Bill "will protect renters by abolishing section-21 ‘no-fault’ evictions".
"We are committed to creating a private rented sector that is fit for the 21st century, which works for responsible landlords while giving tenants greater security in their homes," a spokesperson added.