Why bother asking ?
It's all too much trouble ?Shows a lack of confidence
If you are happy with the job and the customer is happy with the job, its a simple question to ask.
When he/she (in Hectors case
) says she is pleased just say 'can I quote you on that' they all say yes, that's all,job done , no need to 'make it up'
Mrs Jones Acacia Avenue Bumpkingshire...." very pleased with results" etc etc others that live in Acacia Avenue or in and around the area will have a point of reference, thats why you
don't make it up,unless your splash and dash of course
all their testimonials are fake.