CJ.Ecoffet Oct 28, 2013:

I may only agree with Tony M here and re-enforce his comments. "Sales ledger services" is obviously used as a generic term to embrace a whole range of post and pre-sales accounting activities. This is not a terminology issue as such, but it has to be translated taking the global context into account : For instance: "Gestion du poste client"

Tony M Oct 28, 2013:

In business... 'sales ledger' just refers to the whole customer accounts side of things, while conversely, 'purchase ledger' refers to the supplier accounts side.

I doubt it is appropriate to actually include the name of the relevant accounts ledger in the translation — this is merely a convention of commercial EN (a form of metonymy, if you like).