Mary Gorman acted as a greeter at the Northland Church in Longwood, Florida, the US, and also worked in the Christian bookshop after agreeing a deal with prosecutors. Under the deal, charges of assaulting a police officer and possessing cocaine were dropped if she agreed to carry out community service.
Mrs Gorman, 44, spent 200 hours at the church, which has a congregation of 15,000. It is thought she did not reveal why she was there, but was said to have got on well with the locals.
One church member said: "We are missing Mary already. She made such an impression and was so charming. We loved her and her accent and used to call her Scottish Mary."
Another added: "She was great fun. We all assumed she just wanted to help."
Mrs Gorman, of Bridge of Weir, Renfrewshire, was arrested in May following an alleged fracas in the Roxy nightclub, Orlando.
She agreed the deal with prosecutors in June after the arresting officer changed his initial statement over what had happened.