At the end of a succession/estate settlement, the liquidator is usually called to present to the heirs its rendering of account as well as a proposal for partition between the heirs.
For a final redering of account, the proposed cover letter will also allow you to attach a draft discharge to be signed and returned by each heir in favour of the liquidator.
The cover letter for the presentation of the rendering of account, available on this website, will be suitable for most situations.