Hi Kabayan! My sister is actually arriving tonight on family visit visa. She just prepared with her, her passport with the sticker visa, printed visa from moi, affidavit of support which is no need of authentication from DFA. I just had sent to her the original copy of it which was provided by the Phil Embassy here in Qatar. No need for invitation letter as she is on family visit visa. As far as I know the invitation letter is a must to those entering Qatar on tourist visa or business visa. You must send the orig copy of the Affidavit of support right away that it might reach her before her departure in Phil. Though, my the immig officer in NAIA didn't ask my sister about it but it's better to be prepared, it's costly if she'll get hold in the airport. God bless!