Question Summary:
I have a question regarding fasting i.e. is it necessary to have suhoor for qaza of fast?

Question Detail:

 
i have a question regarding fasting i.e. is it necessary to have suhoor for qaza of fast.
also i want to know is getting involved in a sin a trial from Allah.

Answer :

In the Name of Allah, the Most Gracious, the Most Merciful.
As-salāmu ‘alaykumwa-rahmatullāhiwa-barakātuh.
It is not compulsory for one to have Suhoor for Qaza fast or any other fast.
Having Suhoor (pre-dawn) meal is Sunnah. Nabi Sallalahu Alihi Wasallam advise us in a Hadith to have suhoor for verily in having Suhoor there is barakah.
حَدَّثَنَا آدَمُ بْنُ أَبِي إِيَاسٍ، حَدَّثَنَا شُعْبَةُ، حَدَّثَنَا عَبْدُ الْعَزِيزِ بْنُ صُهَيْبٍ، قَالَ سَمِعْتُ أَنَسَ بْنَ مَالِكٍ ـ رضى الله عنه ـ قَالَ قَالَ النَّبِيُّ صلى الله عليه وسلم ‏ "‏ تَسَحَّرُوا فَإِنَّ فِي السَّحُورِ بَرَكَةً ‏"‏‏.(‏بخاري جلد ٣ /٢٩ دار طوق النجاة)
 
Narrated Anas bin Malik:
The Prophet (ﷺ) said, "Take Suhur as there is a blessing in it.
 
It is indeed a test and a trail from Allah Ta’ala for us to be in this transitory world and spend our life in conformity to Shariah.
Allah has kept two evil elements that is being impediments for us in fulfilling the commandments of Allah. One is the Nafs (ego) and the other  is the Shaitaan. 
Allah Ta’ala wants us to overcome these two obstacles and has taught us how to overcome and encounter them as well, and has given us choice to accumulate good deeds by doing good actions and to perpetrate bad actions to accumulate bad deeds. For every good and bad actions we will be rewarded accordingly.
فَمَنْ يَعْمَلْ مِثْقَالَ ذَرَّةٍ خَيْرًا يَرَهُ (٧) وَمَنْ يَعْمَلْ مِثْقَالَ ذَرَّةٍ شَرًّا يَرَهُ (٨)(سورة الزلزلة)
7. So whosoever does good equal to the weight of an atom (or a small ant), shall see it.
8. And whosoever does evil equal to the weight of an atom (or a small ant), shall see it.
And Allah Ta’āla Knows Best
Zakir Husain
Student DarulIftaa
Michigan, U.S.A
Checked and Approved by,
Mufti Ebrahim Desai.