Jason Tran, of View Beauty Lounge, had previously been warned by Hounslow Council's health and safety team on a number of occasions.
Tran was caught in the act when council officers paid a visit to the salon premises in May this year, finding him delivering a manicure treatment, despite his licence having expired in March.
Officers asked him to stop and advised him to apply for a new licence and refrain from carrying out any licensable treatments in the meantime.
After no licence application was made, officers headed over to the salon once more, finding a manicure treatment being carried out by another person, who was not qualified.
Tran was subsequently cautioned again and informed legal proceedings would begin against him due to a further criminal offence being committed.
Councillor Hanif Khan, cabinet member for community protection and enforcement for Hounslow Council, said: "Treatments can cause serious harm if they are not carried out by a qualified person.
"That is why we ask businesses to obtain the correct licence and ensure their staff are fully qualified and have evidence that they are capable of carrying out any such treatment.
"If this is not the case and businesses flout these rules and regulations, then they will face the consequences, we will not hesitate to take the toughest action possible.
"The safety of our residents and customers who use these businesses are our priority."
Tran failed to attend Ealing Magistrates Court on Monday, October 9, but was prosecuted in his absence and fined a maximum fine of £2,500 for the first offence, handed £1,840 in legal costs and must also pay a victim surcharge of £170, bringing the total fine to £4,510.
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