Q. Do you realise whenever you attain Sotapanna Phala? or How do you know whether you are a Sothapanna or Not?

A. Of cause you do - immediately after Sotàpatti Fruit-consciousness (Sotapatti Phala-consciousness), [Normally / The Tikkhapañña (having sharp intellect) Sotapanna Ariya Puggala's (The Stream-Winner Noble person's)] mind itself considers/reviews/contemplates:

1. Sotàpatti Path-consciousness (Sotapatti Magga-consciousness);

2. Sotàpatti Fruit-consciousness;

3. The Nibbana.

4. The eradicated fetters/cankers/defilements; and,

5. The remaining fetters/cankers/defilements.

# And also, (if your are really a Sotapanna,) you can re-attain the Sotapatti-Phala (the Fruit of being Sotapanna) whenever you want (to make sure you are not foxed/fooled/deceived).

# I will explain some characteristics of a Sothapanna. Analyze carefully and you may finalize your decision:

In Sutta method - The Sotapanna (Stream-Winner) has abandoned/eradicated the first three of the lower fetters:

1. Personality view, 

2. Doubt, 

3. Misapprehension of precepts and vows.

Fetters - http://www.buddha-vacana.org/gloss.html#samyojana

1. http://www.buddha-vacana.org/gloss.html#sakkayaditthi
( http://pitaka.lk/18144/461/cs,aps )

2. http://www.buddha-vacana.org/gloss.html#vicikiccha
( https://suttacentral.net/si/an10.14 ) {http://pitaka.lk/36114/cs,aps}

3. http://www.buddha-vacana.org/gloss.html#silabbataparamasa
( http://pitaka.lk/28178/cs,aps )

[http://www.thripitakaya.org/tipitakaya/Index/723?s=21903
1. = 1121; 2. = 1122; 3 = 1123]

# (In Abhidhamma method -) According to Abhidhamma (Buddhist Metaphysics) "A Sotapanna eradicates the 1st, 2nd, 5th, 6th, and 11th types of consciousness as He has destroyed the two Fetters Self-illusion and Doubts." – Here, 3. (misapprehension of precepts and vows) is also included in 1. (personality view), rightly so, as both have got similar root/defilement (wrong view).

As He is completely free from 1 = 1121, He would Never break any of the Five Precepts Ever too (Not even by mistake; not even for own/one's life; not even in your/his dreams).
https://suttacentral.net/si/sn55.11 - http://pitaka.lk/252018/cs,aps

# (Even though some doubts of the topic on Five Precepts – We had a STRONG/SERIOUS discussion about that and you may recap it here, if you want to - Sorry! The Link is not working -https://www.facebook.com/.../permalink/1414686692172091/ - Sinhala Post can be found Here.)

# Further clarifications - http://www.dhammawiki.com/index.php?title=Sotapanna
http://static.sirimangalo.org//mahasi/Ariyavasa%20Sutta.htm