Mehriye is a Persian custom

Custom

Custom may refer to:* Convention , a set of agreed, stipulated or generally accepted rules, norms, standards or criteria, often taking the form of a custom* Customization , anything made or modified to personal taste...

 which directly translates to "Out of love".

It is a supposedly a gift out of love. The amount for this is usually decided before the wedding

Wedding

A wedding is the ceremony in which two people are united in marriage or a similar institution. Wedding traditions and customs vary greatly between cultures, ethnic groups, religions, countries, and social classes...

. It is to be given the Wife-to-be at any point that she demands it.

Note that this is opposite of the India

India

India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...

n dowry

Dowry

A dowry is the money, goods, or estate that a woman brings forth to the marriage. It contrasts with bride price, which is paid to the bride's parents, and dower, which is property settled on the bride herself by the groom at the time of marriage. The same culture may simultaneously practice both...

 which is given by the bride

Bride

A bride is a woman about to be married or newlywed.The word may come from the Proto-Germanic verb root *brū-, meaning 'to cook, brew, or make a broth' which was the role of the daughter-in-law in primitive families...

 to the groom at time of their wedding.