how much times would you ask a provider to verify you so you let another provider know you have seen her..

Just send an email prior, to know you have authorized that provider to request your references..

for a reference, it would likely depend on how recently you visited her.  Some gals will not give you a reference if you have not seen her in recent weeks.  Best bet is to ask her how recently she needs to have seen you in order to give you a reference.

ty for you folks help