What does "Could you please sign this?" mean in English for Spanish?

In English for Spanish, "Could you please sign this?" means:

¿Podría firmar esto por favor?

Listen to "Could you please sign this?": (If you have an HTML5 enabled browser, you can listen to the native audio below)

This is a phrase that is used in the GamesForLanguage English for Spanish Language Game in the following scenes:

• English for Spanish 4, Level 3, Scene 1