Communities in sub-Saharan Africa are being "hurt" by high fees charged by money transfer operators, charity Comic Relief has said.
Restricted competition has helped push up charges, according to research by the Overseas Development Institute (ODI).
Money transfer company Western Union said that fees were set according to factors such as local taxes.
The company "delivered much-needed services to individuals", it added.
'Duopoly'
The research found that average fees of 12% to send $200 (£119) were twice the global average.
Siddo Deva of Comic Relief said: "Imposing such high remittance fees from hard-earned income is hurting the African diaspora and, more importantly, their families and communities in the countries of origin."
Fees charged to Africans wishing to send money back amount to a "super-tax" that could be better spent on education or health, ODI said.
"Africans living abroad make huge sacrifices to support their families, yet face charges which are indefensible in an age of mobile banking and internet transfers," said Kevin Watkins, the report's co-author and ODI Director.
http://www.bbc.com/news/business-2704628512% is
way too high!Sounds like a great chance to teach them about BTC.