You may sign the physical log anytime. Initials are okay. No stamps or stickers on this tiny log. Use only one line per cacher.
The requirement for logging this cache online is as follows:
Sign the physical log. You will need to document that you have found 25 caches with "mint" in the title. Peppermint and spearmint and Panamint are acceptable. Denver Mint and US Mint also work.
Did I say no stamps or stickers?