How much do you ask to be paid up front?

[Ecuadorian]

Just wondering how much you guys ask to be paid before starting work.

[jeff hammond]

half..
then a partial draw during (when applicable)
then the final

[solo]

Depends.

Regular customers nothing, new customers 30% and payment on completion, bad or slow paying customers 50% before starting and payment on completion.

[Krisidious]

I work on a third or 33% draws... 1/3 up front to start Sketches, then 1/3 to start Preliminary Drawings, then 1/3 to start Construction Docs. each payment is approval of the last phase.

[Ecuadorian]

Thanks for your answers.
And, regarding archviz, how do you make sure you will get paid?
Do you place some text or watermark on the images/videos?