Assalamualaikum Warahmatullahi Wabarakatuh.
In the name of Allah, the Entirely Merciful, the Especially Merciful. All praises is due to Allah, Lord of the worlds - The Entirely Merciful, the Especially Merciful, Sovereign of the Day of Recompose. It is You we worship and You we ask for help. Guide us to the straight path - the path of those upon whom You have bestowed favor, not of those who have evoked (Your) anger or of
those who are astray. Ameen.
From Quranic verses and Ahadeeth related to Infaq, we may get some ways practicing of which make it acceptable to Allah s.w.t. that are as mentioned beneath:
a) Every Infaq must be exclusively for the sake of Allah s.w.t. Otherwise, it will not benefit us in the Hereafter. It should never be to make Recipients feel obliged to the Donors or to make the Donors famous. The one who seeks Allah's s.w.t. satisfaction behind his Infaq is a man of true understanding.
Because every Infaq for Allah's s.w.t. sake is long lasting and returnable, brings blessings and causes enhancement both in wealth and reward.
Allah says: And the example of those who spend their wealth seeking means to the approval of Allah and assuring [reward for] themselves is like a garden on high ground which is hit by a downpour - so it yields its fruits in double. And [even] if it is not hit by a downpour, then a drizzle [is sufficient]. And Allah, of what you do, is Seeing.(2:265)
He also says: Not upon you, [O Muhammad], is [responsibility for] their guidance, but Allah guides whom He wills. And whatever good you [believers] spend is for yourselves, and you do not spend except seeking the countenance of Allah . And whatever you spend of good - it will be fully repaid to you, and you will not be wronged. (2:272)
b) Infaq must be from legal wealth. There is no reward in illegal something. Sometimes it may lead to Kufr, if anyone thinks that it is legal to intend reward from such Infaq. Because, to consider sinful something legal is Kufr.
Allah says: O you who have believed, spend from the good things which you have earned.....(2:267)
c) Moderation is another way for Infaq to be made. Because there is right of other persons in the wealth of a person. It is not legal for a person to make Infaq with all wealth unless he is single or has another source from where he may get or has enough confidence on himself to be steadfast in the state of adversity.
Allah says: And do not make your hand [as] chained to your neck or extend it completely and [thereby] become blamed and insolvent. (17:29)
Infaq should not be to assert favour after giving anyone something or to treat the recipient in a manner as to injure his feeling.
Allah says: Those who spend their wealth in the way of Allah and then do not follow up what they have spent with reminders [of it] or [other] injury will have their reward with their Lord, and there will be no fear concerning them, nor will they grieve. Kind speech and forgiveness are better than charity followed by injury. And Allah is Free of need and Forbearing. (2:262-63)