We are going to South America next week and we need to know which documents a US Permanent Resident needs to show in order to return to the USA. Speaking to someone at USCIS is a lengthy chore and their website is very confusing. I've gotten slightly different answers from searching online and need to make sure that we won't have an issue getting back into the country. If a PR has a passport from their home country and the PR card, is that enough, or will Customs require something additional? Thanks in advance folks.