spousal sponsorship and criminality, but clean criminal rec check. how do i expl

[martinhoski]

i'm filling out the spopusal sponsorship and got to the point on backround declaration and i have a dillemma. what do i do in case when back in 2007 i was convicted of illegal drug posession in very small amount (marihuana) and bc it was such a petty crime and it was 5 years ago, it doesn't show on my criminal record. i have a criminal record check in my hands and it shows as clean. how do i explain that in the background check form?? what do i check in those boxes?