a bill, a written statement of money owed

a strong request / a demand, a claim on the basis of some authority (especially for payment)

to make a demand or strong request / to make a demand on the basis of some authority, to make a claim

please give me / (expressing a request) please do something for me

Please do (action)

Please do not (do)

please give me / (polite, imperative) please do something for me; expressing a request

confirmation

confirm, make sure, check, verify

Please have a seat. / Please sit down.