| # | Title | Name | Region | Comment | Date |
|---|---|---|---|---|---|
| 551 | ms | Monika Duncheva | Bulgaria | View | Jan 26, 2013 |
| 552 | N/G | Tim Ryan | N/G | Hidden | Jan 27, 2013 |
| 553 | N/G | miguel angel salcedo rubio | Spain | N/G | Jan 29, 2013 |
| 554 | Mr | Callum Neeson | UK | N/G | Jan 29, 2013 |
| 555 | Mr | Anonymous | UK | N/G | Jan 29, 2013 |
| 556 | mr | cesc serrat | Spain | N/G | Jan 30, 2013 |
| 557 | N/G | Raphael Arnold | Switzerland | N/G | Jan 30, 2013 |
| 558 | Mr | Stiven Bedin | Italy | View | Jan 30, 2013 |
| 559 | Mr | Andrea Fontana | Italy | N/G | Jan 31, 2013 |
| 560 | Mr | Anonymous | Italy | N/G | Feb 02, 2013 |
| 561 | Ms | Lizzie Tran | USA | N/G | Feb 02, 2013 |
| 562 | N/G | Petar Cucuk | N/G | View | Feb 03, 2013 |
| 563 | Mr. | Marco Diaz | Peru | View | Feb 04, 2013 |
| 564 | Ms | Kate Matterson | UK | View | Feb 05, 2013 |
| 565 | N/G | Sid Rigdon | USA | View | Feb 06, 2013 |
| 566 | N/G | Anonymous | USA | View | Feb 06, 2013 |
| 567 | Ms | Emily Henn | USA | View | Feb 06, 2013 |
| 568 | Mr | Anonymous | USA | N/G | Feb 06, 2013 |
| 569 | N/G | Aldo Ferrarin | Italy | Hidden | Feb 07, 2013 |
| 570 | Mr | Ivan Favati | Italy | View | Feb 09, 2013 |
| 571 | Mr | David Liu | Australia | N/G | Feb 10, 2013 |
| 572 | Mr | Fares Doghri | Tunisia | Hidden | Feb 10, 2013 |
| 573 | N/G | Brazitzov Hristo | N/G | N/G | Feb 10, 2013 |
| 574 | mr | filippo contenti | Italy | N/G | Feb 10, 2013 |
| 575 | N/G | marco azzolari | Italy | N/G | Feb 11, 2013 |
| 576 | Mr | Enrico Libani | Italy | N/G | Feb 11, 2013 |
| 577 | N/G | Anonymous | Italy | N/G | Feb 11, 2013 |
| 578 | N/G | Daniel Mancuso | Canada | View | Feb 13, 2013 |
| 579 | Mr | Mark Stevens | USA | N/G | Feb 13, 2013 |
| 580 | N/G | Rohyn Rajean | India | N/G | Feb 15, 2013 |
| 581 | MR | AMIR NAJAM | USA | N/G | Feb 20, 2013 |
| 582 | ms | rickie sugiyama | Canada | View | Feb 21, 2013 |
| 583 | Mr | Ryan Cheng | Singapore | View | Feb 21, 2013 |
| 584 | Ms | Andrea Dimayuga | USA | Hidden | Feb 21, 2013 |
| 585 | ms | alice stead | UK | View | Feb 22, 2013 |
| 586 | N/G | Peter Kapiteijn | Netherlands | N/G | Feb 23, 2013 |
| 587 | Mr | Tyler Pacheco | USA | N/G | Feb 24, 2013 |
| 588 | Mr | Tyler Pacheco | USA | N/G | Feb 24, 2013 |
| 589 | N/G | Amy Bradley | UK | Hidden | Feb 24, 2013 |
| 590 | Ms | April Banaag | Philippines | N/G | Feb 24, 2013 |
| 591 | Mr | Anonymous | Europe | View | Feb 24, 2013 |
| 592 | Mr | Joshua De Stefano | Australia | N/G | Feb 25, 2013 |
| 593 | N/G | giorgia carranza pereZ | Italy | N/G | Feb 25, 2013 |
| 594 | Mr | Hans Anderson | Germany | N/G | Feb 26, 2013 |
| 595 | Mr | Etienne LaFlamme | Canada | View | Feb 28, 2013 |
| 596 | Mr | Gonzalo Arreola Jr. | USA | View | Feb 28, 2013 |
| 597 | Ms. | Laura Saxon | USA | N/G | Mar 09, 2013 |
| 598 | N/G | Sascha Haehn | Germany | N/G | Mar 11, 2013 |
| 599 | Miss | Anonymous | UK | N/G | Mar 11, 2013 |
| 600 | Mr | John Morley | Australia | N/G | Mar 11, 2013 |
- 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