If a contract-holder has concerns about the competency of the person carrying out the test they should ask their landlord what checks they have carried out to ensure the person is competent.
Os bydd gan ddeiliad contract bryderon ynghylch cymhwysedd yr unigolyn sy'n cynnal y prawf dylai ofyn i'w landlord pa wiriadau y mae wedi'u cyflawni er mwyn sicrhau bod yr unigolyn yn gymwys.