In the case of a stay outside the US between 6 and 12 months while keeping US employment & US home, a green card holder may show that it doesn't disrupt the continuity of residence for naturalization purpose.
At what time shall one provide documentation to establish that a naturalization applicant did not disrupt the continuity of their residence in the United States during an extended absence? During US entry after the extended stay? During the naturalization application? If the latter, in which form?