I am working with my fiance to complete the K-1 Visa process. She
lives in South Africa and will be coming to the US. She is filling out
form G-325a "Biographic Information" as required by form I-129f. It
requires that she specify the address of every place she lived and
worked for the past 5 years. Unfortunately, she has experienced
significant hardship in her life and does not have address information
for every place she's lived and worked for the past 5 years.
Sometimes, she would move as frequently as every month.

What options do we have? What will the impact be if there are gaps in her timeline?