What are the chances of getting a green card back?
Not a lawyer, not an immigration expert, not a US State Dept. Consular or Visa office, but a former Green Card holder, now a naturalized citizen. From what I recall of what I was told many years by a friendly US Consular official though, if you give up your green card either voluntarily or by staying out of the USA you have to restart the process all over again form the very beginning and you are treated as a brand new applicant. I was told your prior status as a former green card holder has no bearing or influence on the new application process. This was a long time back though (20 years +) and I have no doubt things have changed somewhat since then.