She
      missed some prayers in the past – what should she do?
Question

                My Aunt ask me to ask you this question, 
She asked in past there were Faraj Salat that she missed, now she wants to know 
what does sharia say about past missed Salat. I would really appreciate if you could answer this question. 
May Allah reward you for evrything
Praise be to Allah.It 
  is not clear from your question whether your aunt missed the prayers because 
  of a reason such as sleeping, forgetting or being unconscious, etc., or whether 
  she missed them deliberately, with no valid excuse. Whatever the case, if she 
  missed them for a reason, she has to make up what she has missed, and also repent 
  for the delay.
If 
  she did not have any excuse for missing the prayers, but denied that they are 
  obligatory, or thought that they did not matter, or was too lazy to do them, 
  then the correct scholarly view is that if a person who does not pray because 
  he does not think the prayers are obligatory, or he is too lazy or he thinks 
  they do not matter, there is no way that he can make up these prayers. There 
  are deeds which must be done for Allaah at night, and He does not accept them 
  during the day, and deeds which must be done during the day which He does not 
  accept at night. (See the book: I want to repent, but…) 
  The person who deliberately does not pray is a kaafir, if he does not pray at 
  all; but if he repents and prays, he comes back to Islam, and he does not have 
  to make up what he has missed, but he is advised to do a lot of naafil prayers. 
  Islam also wipes out whatever (sins) came before.
 Shaykh 
  Saalih ibn Fawzaan al-Fawzaan (may Allaah preserve him) was asked the following 
  question:
 “I 
  am a Muslim woman, al-hamdu-Lillaah. Not so long ago I did not pray and 
  I did not know anything about matters of religion. But now, al-hamdu Lillaah, 
  Allaah has guided me and I have started to pray, fast, read Qur’aan and recite 
  Tasbeeh. I have completed the Qur’aan for the tenth time. Will Allaah forgive 
  me for what I have done in the past and what I will do in the future, in secret 
  and openly in my life? What more can I do so that Allaah will forgive me?” 
The 
  response was: 
Repentance 
  wipes out whatever (sins) came before it. So long as you have repented sincerely 
  – al-hamdu Lillaah – and you are doing the duties enjoined upon you by 
  Allaah and avoiding what He has forbidden, then Allaah will forgive whatever 
  came before that repentance. Allaah says (interpretation of the meaning):
“Say: 
  “O ‘Ibaadi (My slaves) who have transgressed against themselves (by committing 
  evil deeds and sins)! Despair not of the Mercy of Allaah, verily, Allaah forgives 
  all sins” [al-Zumar 39:53] 
  – even shirk, if the person who committed shirk then repents from 
  it to Allaah, He will accept his repentance. Allaah says (interpretation of 
  the meaning):
“Say to those who have disbelieved, if they 
  cease (from disbelief), their past will be forgiven” [al-Anfaal 8:38]. The 
  Prophet  (peace and blessings of Allaah be upon 
  him) said: “Islam wipes away whatever (sins) came before it, and repentance 
  wipes away whatever (sins) came before it.” (Narrated 
  by Ahmad, 4/204). If you have repented sincerely and you do what Allaah 
  has enjoined upon you and avoid that which He has forbidden, this will be sufficient 
  in sha Allaah for your past sins to be forgiven, but you must good deeds in 
  the future, and keep on repenting and obeying the Islamic commandments which 
  Allaah has enjoined upon you.
 And 
  Allaah knows best.
.