Zakaat

Giving zakaat to one's niece on her wedding

Q: If anybody wants to give zakaat to their sister's daughter on her marriage. They have a house and their way of life is normal. But in the age of today, a marriage arrangements is a burden on them.

In this matter, can we give zakaat to them without telling them that this is zakat so they can buy some things. In this case some other people also help them, somebody gave a bedset, someone gave other things. What does Islam say about this. 

Including an amount in one's zakaat calculation that one set aside for sadaqah

Q: I made an intention that a certain portion of my annual bonus will be set aside for Sadaqah and Lillah. The money is not in a separate bank account but together with my savings. I have a spreadsheet of the amount what was spent and how much is still available for charity.

Do I need to include the amount into my Zakaat calculation, assuming that I have not discharged it as charity it for a lunar year? The intention is to still discharge the money as Sadaqah or Lillah.

Clarification: Will the Vat amount be included in the zakaat?

Q: A person gave me R100 of his zakaat and asked me to buy a zakaat hamper and give it on his behalf to the poor. I bought the hamper for R100 which was inclusive of 15% vat and thereafter gave it to a recipient of zakaat. Did R85 of the person's zakaat get discharged or did R100 of His zakaat get discharged?

Similarly, if zakaat vouchers are given to the poor and they make purchases with it from a specific shop to which zakaat money has been given, and the shop owner has been informed that he should give the poor who come to him items to the value of the zakaat vouchers, and the shop owner sells them the items for the full amount of the zakaat vouchers but deducts 15% of the money for vat, will the full amount of the zakaat vouchers be regarded as the zakaat discharged or will the amount less 15% be regarded as the zakaat discharged?