INS had clearly noticed that notarized copy = original, so for the important document, never give up it, you should always keep the original one. Whereever reqire original document, just make a copy and notarize it. Because the US government related offices never return any documents you submitted to them, even if it is important to you.
For example, see instruction of I-140, INS had declared that they never return any document, even if they are important for applicant. They had suggested that for important document, just submit notarized copy.
For example, see instruction of I-140, INS had declared that they never return any document, even if they are important for applicant. They had suggested that for important document, just submit notarized copy.