an instance of being allowed to enter a club, disco, hospital, museum etc

entering or allowing entry

an official written or printed statement that may be used as proof or evidence

authorizing document

the act of discovering or being discovered

finding, uncovering

a formal promise or agreement that certain conditions agreed (e.g. when one buys something) will be fulfilled

pledge, promise

a guarantee

assurance

(an example of) evidence that is sufficient to show that something is a fact

evidence, authentication

(a record of) an act of registering something

the act of registering

proof

proof

an official stamp or paper used to show that a person may visit a foreign country

legal document