Quick thinking from a bank clerk led to the arrest of two men on suspicion of committing fraud by false representation on Wednesday, 20 May.
Officers managed to catch up with two men near the house of an elderly woman as they waited for her to return home in Rhondda.
The woman, 71, had gone to the bank to withdraw money – payment for them to clean her patio.
But when the woman tried to withdraw hundreds of pounds, the bank clerk became suspicious and called police who responded immediately and headed for the address.
Two men were arrested and taken into custody – they have since been released under investigation.
Local Inspector Russ Jenkins said: "I'd like to praise the bank clerk who alerted us so quickly and use this opportunity to remind the public that there are people out there who are willing to take advantage of vulnerable relatives and neighbours."
Anybody who suspects rogue traders have been in their area should call 101 immediately.