| # | Name | Town/City | S/C/P | Region | Comment | Date |
|---|---|---|---|---|---|---|
| 501 | Mark Hogan | Industry | PA | USA | N/G | Oct 16, 2017 |
| 502 | Jason Vaughn | Basehor | N/G | USA | N/G | Oct 16, 2017 |
| 503 | Kirsten Sorensen | Sonderborg | Denmark | Denmark | View | Oct 16, 2017 |
| 504 | Jon Speyer | Harrow | N/G | UK | View | Oct 16, 2017 |
| 505 | Anonymous | N/G | N/G | Netherlands | N/G | Oct 16, 2017 |
| 506 | Anonymous | Marseille | PACA | France | N/G | Oct 16, 2017 |
| 507 | Joe Tanjung | Paris | Paris | France | View | Oct 16, 2017 |
| 508 | I Coghill | N/G | N/G | UK | N/G | Oct 16, 2017 |
| 509 | Aibhilín Blackthorne | N/G | N/G | UK | View | Oct 16, 2017 |
| 510 | Anonymous | London | Greater London | UK | N/G | Oct 16, 2017 |
| 511 | Alex Rees | Ringwood | Hampshire | UK | N/G | Oct 16, 2017 |
| 512 | gail swinburn | Oxford | Oxon | UK | N/G | Oct 16, 2017 |
| 513 | Hammad Fatooqi | N/G | N/G | Canada | N/G | Oct 16, 2017 |
| 514 | James Sangster | Seinäjoki | Southern Ostrobothnia | Finland | N/G | Oct 16, 2017 |
| 515 | Kenny L | N/G | N/G | Sweden | N/G | Oct 16, 2017 |
| 516 | Anonymous | Mumbai | Maharashtra | India | View | Oct 16, 2017 |
| 517 | Anonymous | Melbourne | Victoria | Australia | N/G | Oct 16, 2017 |
| 518 | Carolyn Reyes | Madison | Wisconsin | USA | View | Oct 16, 2017 |
| 519 | maria pop | Toronto | Ontario | Canada | N/G | Oct 16, 2017 |
| 520 | Anonymous | Århus | N/G | Denmark | N/G | Oct 16, 2017 |
| 521 | Anonymous | Killeen | Texas | USA | N/G | Oct 16, 2017 |
| 522 | David Wilson | Rotherham | South Yorkshire | UK | N/G | Oct 16, 2017 |
| 523 | Heather Warkentin | Abbotsford | British Columbia | Canada | N/G | Oct 16, 2017 |
| 524 | Catherine Calero-Jacobsen | Oslo | Oslo | Norway | N/G | Oct 16, 2017 |
| 525 | Xavier Louwagie | Edegem | Antwerpen | Belgium | N/G | Oct 16, 2017 |
| 526 | Jan Skelton | Oxford | Oxfordshire | UK | N/G | Oct 16, 2017 |
| 527 | Aniisah Dustagheer | Vacoas | N/G | Mauritius | N/G | Oct 16, 2017 |
| 528 | Clair Holm | DC | DC | USA | N/G | Oct 16, 2017 |
| 529 | Anonymous | Chicago | Il | USA | N/G | Oct 16, 2017 |
| 530 | Anonymous | N/G | N/G | USA | N/G | Oct 16, 2017 |
| 531 | Lindsay Mckeown | Glasgow | South Lanarkshire | UK | N/G | Oct 16, 2017 |
| 532 | Luke Larter | Calgary | Ab | Canada | N/G | Oct 16, 2017 |
| 533 | Reem Mokhtar | Durham | NC | USA | N/G | Oct 16, 2017 |
| 534 | Ian Bellis | Groveport | Ohio | USA | N/G | Oct 16, 2017 |
| 535 | Ryan Weeks | Edmonton | Alberta | Canada | View | Oct 16, 2017 |
| 536 | Andrea Bullivant | PRENTON | MERSEYSIDE | UK | N/G | Oct 16, 2017 |
| 537 | Chad Mooney | Belleville | Illinois | USA | N/G | Oct 16, 2017 |
| 538 | Maria Thomsen | Malmö | N/G | Sweden | N/G | Oct 16, 2017 |
| 539 | Philippa Jacks | Sydney | NSW | Australia | N/G | Oct 16, 2017 |
| 540 | Lindsey Currie | Glasgow | Scotland | UK | View | Oct 16, 2017 |
| 541 | Chris Corbett | N/G | N/G | UK | N/G | Oct 16, 2017 |
| 542 | Anonymous | London | N/G | UK | N/G | Oct 16, 2017 |
| 543 | Anonymous | Huntingdon | Cambridgeshire | UK | View | Oct 16, 2017 |
| 544 | Sushruta Bhattacharjee | Kolkata | West Bengal | India | View | Oct 16, 2017 |
| 545 | Paulina C | N/G | N/G | N/G | N/G | Oct 16, 2017 |
| 546 | Anonymous | Liverpool | N/G | UK | N/G | Oct 16, 2017 |
| 547 | Anonymous | Surbiton | Surrey | UK | N/G | Oct 16, 2017 |
| 548 | Fredrik Holmgren | Helltown | Skane | Sweden | View | Oct 16, 2017 |
| 549 | Esther van de Ridder | Harderwijk | Gelderland | Netherlands | N/G | Oct 16, 2017 |
| 550 | Anonymous | Liverpool | Northwest | UK | N/G | Oct 16, 2017 |
- S/C/P - State, County or Province
- Dates displayed in the signature list are based on UTC/GMT
- Anonymous signatures signify people who have chosen not to display their names publicly
- A comment in gray indicates that the signer has hidden their comment from public view