The Commissioner for Standards in the House of Commons at Westminster has recommended that DUP MP Ian Paisley Jnr be suspended for 30 days over non-declaration of £100,000 in hospitality from the government in Sri Lanka.
The recommendation was issued in the standard commissioner's report into the incident today. 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.
The commissioner examined if Mr Paisley breached British parliamentary rules and decided that "in view of the seriousness of this matter" Mr Paisley be suspended from the Commons for a period of 30 sitting days.
Through his solicitor, Mr Paisley issued a statement saying he has "apologised unreservedly at the outset for his unintentional failure to register the hospitality he received.
"While accepting the decision of the House Standards Committee, he nonetheless continues to take issue with the sensationalised report in the Daily Telegraph. Legal proceedings are being considered.
"No further comment will be made until Mr Paisley has addressed the House on Thursday."
The recommendations will need to be approved by the UK House of Commons before being confirmed.
The sanction could see Mr Paisley face a by-election.
Members who are suspended from the Commons for more than ten days are open to a recall petition.
A by-election would be triggered if 10% of the electorate in Mr Paisley's North Antrim constituency sign that petition.
If rubber-stamped by parliament, the suspension would also mean Prime Minister Theresa May will be shorn of one of the ten DUP MPs propping up her minority government during a period that could see a number of crucial Brexit votes in the House of Commons.
A spokesperson for the Democratic Unionist Party said: "The party has noted the House of Commons Standards Committee's report on Ian Paisley MP. These matters will now be considered by the Party Officers."