Letting agents in a London borough have been publicly warned this week that they must sign up to a redress scheme after a local firm was fined £5,000.

Islington Council has also put agents on notice that they must observe the law in displaying fees.

This week, the authority is writing to all local letting agents to remind them that any failure will result in a penalty of up to £5,000.

In what may have been one of the first actions of its kind, Islington Council this month fined APS Estates for its failure to join one of the three redress schemes.

Before the new rules came in last October, Islington Council’s trading standards team and the Property Ombudsman wrote to letting agents in the borough advising them to sign up to a scheme or risk a fine.

Almost all of Islington’s 150 letting agents signed up, but APS Estates did not. Trading standards followed up the letter with a visit and further reminders.

In December, Islington’s trading standards team issued a notice saying they intended to impose a fine of £5,000 for failing to sign up.

APS Estates appealed the decision, but this month an independent tribunal found in favour of Islington Council and agreed that the fine should remain at £5,000. APS Estates has now joined TPO.

Cllr James Murray, Islington Council’s executive member for housing and development, said: “More and more people in Islington rent privately, and we want to make sure they are treated well and not ripped off.

“The vast majority of local lettings agents signed up to a redress scheme in good time, but we took action against the small number that did not. It’s important that tenants and landlords can get independent adjudication if they have a complaint.

“It’s also important that letting agents follow the rules about displaying fees. We’ll be encouraging them to do so now, so that they avoid the possibility of a fine.”

Richard Tacagni, managing director of consultancy firm London Property Licensing, said: “It is great to see Islington Council taking such proactive action to enforce these new regulations, thereby helping to safeguard both landlords and tenants.

“Unlike a Magistrates’ Court fine, this £5,000 civil penalty is paid to the council and can be reinvested to fund further enforcement activity.”