Rivett’s father, James, a successful Inner Temple barrister, originally came from Stowmarket in Suffolk. He surrendered his chambers in 1567, shortly after serving as treasurer of the Inn, and moved back to Suffolk, where he already owned sufficient land to be assessed at £16 for the subsidy. He made further purchases and was custos rotulorum by the time of his death in 1588.
Rivett was returned unopposed at Aldeburgh in 1604, although the borough’s other seat was contested. It is not known how he secured his election. His only committee in the first Stuart Parliament (8 June 1604) was for the bill to frustrate a release unduly procured by Edmund Penning, the younger son of an Ipswich family.
Imprisoned for debt in the King’s Bench gaol by 1608, Rivett was presumably released shortly thereafter as he was granted by the king five-sixths of an outlaw’s goods and chattels in October of that year.
