DUP MP Ian Paisley Junior has been registered on the Westminister parliament's website as an Independent.
The House of Commons said this was a procedural matter and Mr Paisley would remain listed as an Independent until his suspension was concluded.
The DUP is carrying out an internal party investigation into his conduct.
The suspension without pay will begin on 4 September.
Mr Paisley denied the claims that he and his family enjoyed two all expenses paid holidays in Sri Lanka in 2013.
He referred himself to the House of Commons parliamentary watchdog when the allegations emerged last September in the Daily Telegraph newspaper.
The commissioner, which said the cost may have been "significantly more" than Mr Paisley's estimate, said the Sri Lankan holidays included business-class air travel, accommodation at first-class hotels, helicopter trips and visits to tourist attractions for the MP and his wider family.
Mr Paisley estimated the hospitality to be worth around £50,000.