DUP MP Ian Paisley’s supporters will meet on Monday to show their support.
The North Antrim politician is currently suspended by the House of Commons after he failed to declare family holidays paid for by the Sri Lankan government.
The DUP MP apologised in the Commons, but will face a by-election if 10% of his constituents sign the petition.
He is also suspended by the DUP “pending further investigation into his conduct”.
A recall ballot, where voters can sign a petition calling for a by-election, has been opened.
The recall petition is the first in UK parliamentary history.
Monday’s meeting has been organised by DUP councillor John Finlay and will be attended by Mr Paisley.
In a letter to activists, Mr Finlay said Mr Paisley had received a “very severe punishment”.
He said some people are using the current situation to try and unseat him.
“I think we can all agree with the Speaker of the House, Mr John Bercow MP, when he said it was ‘a regrettable state of affairs’,” said Mr Finlay.
“I trust also that you will have been saddened by the subsequent torrent of condemnation and abuse our friend has suffered since the issue became public.”
He added that people have supported him during the good times and that it was now important to back him when times were not so good.
Venues in Ballymena, Ballymoney and Ballycastle have been opened where voters can sign a petition calling for a by-election.
According to the Electoral Office for Northern Ireland (EONI), the number of people entitled to sign the petition – or eligible registered voters – is 75,478.
The Recall of MPs Act 2015 requires a petition to be signed by 10% of that number in order to trigger a by-election.
The number of signatures required would have been 7,547, but last week the Electoral Office said the figure was 7,543 – due to a “sweep” of the register removing deceased voters and others who were not eligible.
If that number of signatures are gathered, Mr Paisley would be forced to resign and a by-election would be called – an election Mr Paisley has said he would fight.
What is a recall petition?
This is a fairly recent addition to politics, becoming law under the Recall of MPs Act which came into effect in 2016.
It states that MPs who are convicted of a criminal offence and jailed, convicted of providing false information on allowance claims or barred from the House of Commons for 10 sitting days or longer can lose their seat if there is a successful petition to recall them.
Last month, Mr Paisley received a ban from Westminster of 30 sitting days for breaching parliamentary rules, beginning on 4 September, which triggered the recall procedure.
How long is the petition open?
The petition is open for signing for six weeks from 8 August to 19 September from 09:00-17:00 BST, Monday to Friday.
Opening hours at the designated centres will be extended to 21:00 on 6 and 13 September.
Who can sign it?
Letters have already been sent to constituents informing them about the details of the petition.
Anyone wanting to sign it must live in the North Antrim constituency and be 18 years old, or have their 18th birthday before the end of the signing period on 19 September.
But just like in any normal election, anyone wanting to sign it must also be registered to vote in parliamentary elections.
Where can the petition be signed?
The Electoral Office selected three designated venues which are located at:
- Joey Dunlop Leisure Centre, Ballymoney
- Seven Towers Leisure Centre, Ballymena
- Sheskburn House Recreation Centre, Ballycastle
Legislation allows for up to 10 locations for the petition but the electoral office has opened three, a decision which drew criticism from some political parties.
Voters can also apply to sign by post or proxy. Applications for those must be returned to the Electoral Office by 4 September.
The chief electoral officer, Virginia McVea, said there had been a change in the law in relation to the postal application so anyone who chooses not to attend in person will be able to apply for the postal option and if their details are verified, can receive it within six weeks.
Applications can be downloaded at eoni.org.uk.
There are two help lines for constituents who have queries about the process.
They are 02890446600 and 02890446668.
What happens when the petition closes?
If the number of signatures reaches or surpasses 7,543 it will trigger a by-election and Mr Paisley will lose his seat.
There would be nothing to stop him from standing in the by-election, however, and he has already indicated that he would do so.
He has been the MP for North Antrim since 2010.