For a memory competition to be included in the World Rankings table, an event must be supervised by a qualified arbiter approved by the governing body of the sport, The World Memory Sports Council. Without an approved arbiter, results will not count towards the World Rankings.
By ensuring that all competitions are run in exactly the same way and marked to the same standards, it is possible to accurately compare competition results with those of other competitors around the world over the past 26 years of the sport.
Arbiters are appointed by the WMSC and then recognised by GOMSA, the Guild of Mental Sports Arbiters.
The current list of Qualified and licensed arbiters is shown below. If you believe your name should be on the list and has been missed, please contact the secretary.
| First Name | Surname | Level | Country |
| Phil | Chambers | 5 | England |
| Dominic | O’Brien | 5 | England |
| Elaine | Colliar | 4 | Scotland |
| Jennifer | Goddard | 4 | Australia |
| Alexander | Keene | 3 | England |
| Sophie | Huang | 3 | P.R. China |
| Guo | Chuanwei | 3 | P.R. China |
| David | Sedgwick | 3 | England |
| Jorge | Castaneda | 3 | Mexico |
| He | Lei | 3 | P.R. China |
| Idriz | Zogaj | 2 | Sweden |
| Teo | Kim Foo | 2 | Malaysia |
| Wang Sheng | Kai | 2 | Taiwan |
| Riadh | Bensaoucha | 2 | Algeria |
| Salah | Eddine Djilah | 2 | Algeria |
| Dr Kranth | Raj | 2 | ndia |
| Klaus | Kolb | 2 | Germany |
| Khatanbaatar | Khandsuren | 2 | Mongolia |
| Anne Bernadette | Bonita | 2 | Philippines |
| Amine Ahmed | Chala | 2 | Algeria |
| Dr Henry | Toi | 2 | Singapore |
| Yan | Kewei | 2 | P.R. China |
| Meng | Hongfei | 2 | P.R. China |
| Marek | Kasperski | 1 | Australia |
| Petrina | Kasperski | 1 | Australia |
| Michel | Wozniak | 1 | France |
| Pavan | Bhattad | 1 | India |
| Dave | Farrow | 1 | USA / Canada |
| Luis | Jardim | 1 | Portugal / Spain |
