Fraser Robert Nutland of Bick Farm admitted the charge of theft, in which he stole a charity collection box belonging to Wiltshire Air Ambulance.
He also pleaded guilty to taking another box belonging to Prospect House Hospice Charity in Wroughton.
Both collection boxes were valued at under £50
Swindon Magistrates took his guilty pleas in to consideration when they fined him £115.
He was also ordered to pay a surcharge to victim services of £30 and £85 costs.