For what it's worth, when the woman at Thai immigration told me to get my landlord's credentials and a lease agreement to extend my tourist visa beyond the Sept. 2 amnesty period, she suggested that I make several copies of them, for subsequent applications...
TLDR : Answer Summary
A user shares their experience at Thai immigration, where they were advised to obtain their landlord's credentials and a lease agreement for extending their tourist visa beyond the amnesty period of September 2. They were also recommended to make several copies of these documents for future applications. Community comments emphasize the importance of scanning these documents in color and suggest the possibility of extending the visa on a monthly basis.