Add punctuation: Complaints by the client that the speaker does not live up to expectations will only be accepted if the speaker does not fulfil criteria regarding correct dialectnative speaker or if the recording is quite unacceptable or unprofessional compared with the voice demo In such an instance a refund of the speaker fee may be appropriate
A: Complaints by the client that the speaker does not live up to expectations will only be accepted if the speaker does not fulfil criteria regarding correct dialect/native speaker or if the recording is quite unacceptable or unprofessional compared with the voice demo. In such an instance, a refund of the speaker fee may be appropriate.

Add punctuation: If for whichever reason collection through the Payment Service should fail Tourstart will invoice you by post for the amount payable which must be paid by cheque postal order or credit card within 15 days from the date of invoice
A: If, for whichever reason, collection through the Payment Service should fail Tourstart will invoice you by post for the amount payable, which must be paid by cheque, postal order or credit card within 15 days from the date of invoice.

Add punctuation: The fate and mystery of the historical Moses is researched by Ove von Spaeths
A:
The fate and mystery of the historical Moses is researched by Ove von Spaeth's