Paying wealth acquired from interest to avoid compulsory conscription
Question

                Serving in the army is compulsory in my country. While kufr is tolerated, salaah, Quraan and everything that has a relation to Islam is banned; one will even be punished if he practices it. We can avoid conscription by paying a large sum of money.

The question:

Is it permissible to use the wealth gained from interest in order to avoid joining the army? Considering that we do not have Islamic banks here.
Praise be to Allah.Firstly: 
If the matter is as you 
    describe, that kufr is allowed in this army and prayer and reading Qur’aan 
    are not allowed, then there is nothing wrong with paying money in order not 
    to join up, and it is permissible to avoid it by all Islamically acceptable 
    means.  
Secondly: 
It is not permissible to 
    deal in riba, whether by giving or taking loans, and it is not permissible 
    to make use of or benefit from interest. The one who is faced with that has 
    to repent from dealing in riba and get rid of this interest by spending it 
    on the public interest; he has no right to benefit from it himself. This has 
    been discussed in the answer to question no.
    20876 and
    45691. 
If this money has come to 
    you from someone who has repented and wants to get rid of it, there is 
    nothing wrong with you making use of it in the manner you mentioned, or in 
    some other way, because it has come to you in a permissible manner, and the 
    prohibition applies only to the one who acquires it. 
It is permissible for the 
    penitent himself to make use of this money that he acquired in a haraam way 
    if he has repented from riba and resolved not to go back to it again, and he 
    needs to make use of the interest that he already has in his hand to ward 
    off harm from himself, as in the case asked about here. So it seems that it 
    is permissible for him to make use of the interest in this case. 
Ibn al-Qayyim discussed at 
    length the issue of getting rid of haraam wealth, and he stated that the way 
    to get rid of this wealth and repent fully is: by giving it in charity, but 
    if he is in need of it, then he may take as much as he needs, and give the 
    rest in charity. See: Zaad al-Ma’aad (5/778). 
Shaykh al-Islam [Ibn 
    Taymiyah] (may Allaah have mercy on him) said: If this prostitute and this 
    wine-seller repent, but they are poor, then it is permissible to give them 
    as much of this money as they need. If he is able to do business or a 
    handicraft such as weaving and spinning, then he should be given enough as 
    capital (to start a business). End quote from Majmoo’ al-Fataawa 
    (29/308). 
But it is not permissible 
    to carry on dealing in riba in order to make use of the interest to pay 
    fines, taxes and the like. 
And Allaah knows best.