Certification for seafarers is verified during each PSC inspection. On 1 January 2017 new STCW requirements enter into force and seafarers may need new certificates.

In line with a recommendation from the International Maritime Organization (MSC.1/Circ.1560), the Paris MoU has agreed on a harmonized approach.

In cases where a seafarer's documentation complied with the requirements in force immediately before 1 January 2017, but was not in accordance with the requirements of the 2010 Manila Amendments to the STCW Convention, PSCOs should take a pragmatic and practical approach during inspections until 1 July 2017.

When a deficiency is found this will not result in the ship being detained.

However, a deficiency may be recorded and the master will be instructed to rectify the deficiency before 1 July 2017.