Family re unification (D/VF) visa procedure for Non EU citizen

Hello Friends

I need your input on my current situation.

I'm married (9th Sep 2017). My wife is a Romanian citizen and I am an Indian citizen. We married here in India and subsequently went to the embassy an got the Romanian marriage certificates. We have known each other for 7 years. Been in relation for 3 years. She visited India in this period 4 times. We were unsure whether to settle in Romania or India but climate here did not suit her too well during her visits and at the end decided to move to Romania.

She lives in Bucharest . I'm currently based in Kolkata.

She had gone to the immigration office with the Romanian marriage certificate and other required documents for sending the invitation letter but was informed at the counter that since we already have the Romanian marriage certificate she just needs to send an long stay invitation letter personally and not through immigration. However when I was trying to apply for the visa online the D/VF category mentions that it requires invitation letter from immigration.

Can someone please tell me the procedure for application.

Thanks in advance.