Members of an office pool that won a $50 million Lotto Max prize travelled to Ontario Lottery and Gaming Corp. headquarters Wednesday to be interviewed about who really has a claim to the prize.

They cancelled the limousine ride they had earlier booked for the trip, which was intended to be a celebratory outing to accept the cheque. On arrival, some of them clearly didn't want their faces captured by television cameras, while others said they were overwhelmed by recent events.

A group of 19 people at a Bell Canada call centre in Scarborough had the ticket validated on Monday.

But on Tuesday, at least one person came forward to claim they were also a member of the pool.

Sarah Kiriliuk, an OLG spokesperson, described Wednesday's interviews as the second step in the process of awarding the huge jackpot.

"They start out investigating who is part of the group," she said.

If the 19 original claimants are found to be the legitimate winners, their portion will be $2.63 million.

Even if a 20th claim was found to be valid, each of the members would still win $2.5 million each.

The leader of the Bell pool group claims to have thoroughly documented who contributed.

This situation has Torontonians who participate in office lottery pools talking about how they protect their interests in the event of a disputed claim.

The problem has come up before.

In 2008, a group of 28 people in Barrie had to wait months for their payout after others claimed to be entitled to a portion of the $24.5 million prize. Nearly $4 million plus interest went to the challengers.

It isn't known yet how long the Bell workers will have to wait for their claim to be resolved. It could happen within a few days or sometime next week, CTV Toronto reported.

The OLG has a group play form available to help keep track of who is participating.

"Prior to the draw, make a group decision about how much of the prize winnings will be split among the group and how much will be returned into future lottery ticket purchases," it said.

"After you have purchased the tickets and signed them, you may decide to make copies for each group member so everyone knows which numbers you're playing."

With a report from CTV Toronto's Michelle Dube