Posting document with 4 eyes review

Dear SAP-GURUS,

has anybody experience with 4eyes-review roles in the accounting (posting document) procedure.

Our client from the USA wants to realise the G/L postings with the following criterias:

- someone has a right only to edit/park and change a posting

- someone else is able to display and release the document. In case changes are needed, the document can only be changed by the person who created the posting.

Our question is: has anybody already realised a concept having similar criterias?

Has anybody had a similar request?

If yes, could you apply the standard roles or did you have to develop some extra roles? (02,77 and 01,03)

Thanks for your help in advance.

Kind regards,

Ildiko Kustan"