this is my personal list of things to look out for when i'm trying to guess the identity of anon authors in fests/exchanges etc, i have been applying this since 2016 and it works really well so long as the author is not actively aware of these things and trying to obscure their identity (if you're trying to stay anon you can also purposefully change these things i guess). also requires that the author has other published fic to compare the fic in question against, otherwise good luck lmao. in order (formatting + a/ns interchangeable since formatting is more obvious but a/ns appear first when reading), these are what i check:
FORMATTINGthe biggest giveaway imo because people usually have a certain style of formatting fics that they stick to. for example, i always open and end with 7 empty lines of buffer space and i use 7 empty lines as scene breaks. visually it's pretty obvious so it's easy to spot
- scene breaks - how do they indicate different scenes? hyphens, tildes, default ao3 scene dividers, empty space (a large amount / a small amount)?
- spacing - do they delete the double spaces ao3 inserts between lines if you paste directly from a word processor into rich text editor? do they delete the extra spaces that pop up around italics?
- emdashes - how do they use and format them? do they use emdashes (—), endashes (–), hyphens (-), double hyphens (--), etc? what kind of spacing do they do around them eg no spaces, spaces on both sides, spaces on one side only?
- spelling - ok not technically formatting but do they use american or british spelling/vocabulary?
- punctuation - do they use single or double quotes for dialogue?
- typographic apostrophes and speech marks - less reliable than the above bc it depends on your word processor eg editing directly in the ao3 post work box will give you non-typographic marks, and for some reason typing on gdocs on my mobile gives me non-typographic marks too even though i get typographic marks on my laptop. but some people do all their fics with non-typographic apostrophes/speech marks and some people (me) are very particular about this and replace all non-typographic marks with typographic ones (unless i'm too lazy to bother doing it right away. but it'll annoy me enough on reread that i'll fix it eventually)
AUTHOR'S NOTES
people are usually more informal in a/ns so this can give some handy info especially if you're familiar with how they talk on social media platforms etc. i tend to say the same kind of thing in all my a/ns eg i address my recip in the opening note if it's an exchange fic, i clarify details about the setting such as time period, i thank anyone who helped me with the fic, i include extra content warnings not in the tags. there are exceptions but overall i feel like the tone of my a/ns remains consistent
- grammar - do they use proper capitalisation and/or punctuation? this can fluctuate a bit so make sure you have a decent sample space to check against
- emojis - do they often use kaomojis or smileys or heart emojis in their a/ns? which ones?
- disclaimer - i don't see these around often anymore so it's even more of a giveaway, especially the specific phrasing
- betas - do they thank betas? who are those betas? though a lot of people will redact names or abbreviate to initials during the anon period so it's less helpful
- inspiration - do they mention songs, poems, other stories etc as inspiration? what are those sources?
- epigraph - not technically part of the a/n but usually close to the top so i'll include it. THIS IS SUCH A HUGE GIVEAWAY even just the presence of an epigraph can be super telling. how is the epigraph formatted (line spacing, alignment, author attribution and title)? who is the epigraph from?
- end notes - what do they tend to say in end notes eg spoilery content warnings, something about welcoming kudos/comments?
STYLE AND CONTENTthe least reliable indicator bc 1) a lot of people write similar themes 2) in exchanges content will probably be tailored more to the recip's interests than the author's 3) personally i feel like my style is really malleable between fics so i wouldn't even be able to recognise me 4) this is super hard to look for unless you know the author's prose really really well. nonetheless this can work as a like confirmation step after you've narrowed down your guesses using the above, i just wouldn't use it as the primary determinant
- fandom - is the fic in a fandom you know the author is in? obviously less applicable for rarer fandoms esp around yuletide. maybe i should rephrase it as the inverse ie if you know the author hates that fandom they probably won't have written for it. process of elimination!
- themes - might need some close reading to determine but often even in exchange fics Characteristic Themes will pop up
- prose style - if they have a super distinctive style you might be able to tell