[swarmee]

A "review" submission is for cards already graded by PSA that you think will bump to the next grade.

A "crossover" submission you send in the other company's slab and they check it in that, and if it meets the minimum grade you request, they will break it out and put it in their slab with their new grade.

A "crackout" submission is where the owner cracks them out of the slabs and submits them raw. Some people think this is the best way to get the best grade, because they're worried that if you send it into PSA in SGC or BVG or GAI that they'll automatically downgrade it (if you request a min grade lower than those companies) or send it back in the original holder if it doesn't meet the grade you request. The crackout is also the most risky, because they card could have a number grade from a different company, and PSA may determine it to be trimmed or factory cut short and then not give it a number grade. One guy on PSA's message board did this with like 15 PSA or other 7 and 8 1950s Hall of Famers and half of them came back marked "MINSIZREQ" which means factory cut short and no longer graded unless they meet the right size for the issue. So he probably lost a few thousand in value. If he sent them in as a review sub, he would at least have kept them in their original grades and maybe got a few bumps.