Alistair McLean, chief executive of the Fundraising Standards Board, will hold a meeting with representatives from telephone fundraising agency Pell & Bales to discuss allegations in the News of the World newspaper that the organisation used "shameless tactics" to raise funds.
An article in the newspaper last weekend said staff at the organisation were told during a training session to ask for donations up to four times during a phone call and were reprimanded by bosses if they did not do so.
It also said Pell & Bales staff called members of the public who were registered with the Telephone Preference Service.
Pell & Bales strongly denies the claims.
Colin Lloyd, chair of the Fundraising Standards Board and the Telephone Preference Service, said McLean would meet representatives from Pell & Bales to discuss the allegations.
"Pell & Bales has made a very helpful contribution to the discussions we have had about telephone fundraising during the past few months," he said. "I hope the FRSB can have a constructive meeting to get some clarity on what has happened."
Derwyn Jones, chief executive of the Panther Group, which owns Pell & Bales, denied the allegations in the News of the World.
"We constantly work with the FRSB and are happy to meet them," he said. "If both parties will benefit from the discussion, I'm happy to be involved."
Jones said the firm contacted people registered with the TPS only if they were existing supporters of the charity and had expressed a wish to be contacted.