I'm using the alphabetic biblatex style and have to format my sources the following way, if there are two sources with the same author:

  • either as "KEY-1" (where -1 replaces a)
  • or as "KEY1" (where 1 replaces a).

How can I achieve this?

Current status:




    author={B. Obby},
    title={Sources today},
    author={B. Obby},
    title={Sources tomorrow},



Text with citation: \autocite{text:source}


  • 2
    – moewe
    Feb 22, 2017 at 13:39
  • 1
    @moewe I was wondering who chooses the name of biblatex options, shouldn't something like labelsuffix have been better? :):):):)
    – CarLaTeX
    Feb 22, 2017 at 14:40
  • 1
    Exactly! You're not the only one who have searched an option for "hours" and then discovers that it has an unthinkable name! :):):):):):)
    – CarLaTeX
    Feb 22, 2017 at 15:04
  • 1
    @moewe Even extrayear is not much clear... also in that case I'd have chosen yearsuffix... :)
    – CarLaTeX
    Feb 22, 2017 at 16:49
  • 1
    @CarLaTeX That's a great idea. I would definitely participate!
    – TeXnician
    Feb 23, 2017 at 8:30

1 Answer 1


As @moewe suggested, it is very simple: \DeclareFieldFormat{extraalpha}{#1} is sufficient to fullfill the task, because it is as customizable as every field format.

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