Warnings from Canada and USA: Misuse of dowry laws

Canada
http://www.voyage.gc.ca/dest/report-en.asp?country=128000#6
Growing numbers of Canadian citizens have been caught up in marital fraud and dowry abuse in India. Most cases involve Indo-Canadian males who abandon their wives in India after cheating them out of large sums of money. Other cases involve misuse of India’s Dowry Prohibition Act. This law, which was enacted to protect women and makes demanding a dowry a crime, is sometimes used to blackmail men through false allegations of dowry extortion. Individuals facing charges may be forced to remain in India until their cases have been settled or pay off their spouses in exchange for the dismissal of charges. To avoid such problems, you are advised to register your marriage in India along with a joint declaration of gifts exchanged, as well as consider a prenuptial agreement

USA
http://travel.state.gov/travel/cis_pa_tw/cis/cis_1139.html
A number of U.S.-citizen men who have come to India to marry Indian nationals have been arrested and charged with crimes related to dowry extraction. Many of the charges stem from the U.S. citizen's inability to provide an immigrant visa for his prospective spouse to travel immediately to the United States. The courts sometimes order the U.S. citizen to pay large sums of money to his spouse in exchange for the dismissal of charges. The courts normally confiscate the American’s passport, and he must remain in India until the case has been settled. There are also cases of U.S.-citizen women of Indian descent whose families force them against their will into marriages to Indian nationals.