E-commerce promoters from Japan, the United States, Europe and South Korea have agreed to collaborate in dealing with consumer complaints over cross-border online trade, the Japan Chamber of Commerce and Industry said Friday.

The chamber, the Better Business Bureau of the U.S., the Korean Institute for Electronic Commerce and the Japan Direct Marketing Association agreed in a meeting in Tokyo to coordinate their procedures for resolving consumer complaints, it said.

The Federation of European Direct Marketing Associations and Eurochambers have also committed to the tieup, it said.

Also agreed to were the establishment of minimum international standards for responsible online business practices and an international "trustmark" to certify that Web sites abide by these standards and the complaint resolution procedures.

The entities aim to map out details and sign what they call an "Online Trust Alliance" early next year in order to put the measures in place as early as possible, the chamber said.