This is the 936th most frequent Danish word.
sendes
"Sendes" means "is sent" or "to be sent" in English.
In this sentence, 'sendes' is used as a passive verb to indicate an action that needs to be performed on the subject, the document.
Dokumentet skal sendes til kontoret inden tirsdag.
The document must be sent to the office by Tuesday.
In this context, 'sendes' would change to 'sendt' for past tense, as the sentence describes a completed action.
Brevet blev sendt i går og vil snart være fremme.
The letter was sent yesterday and will soon arrive.
Here, 'sendes' is used in the present tense passive voice, stating a regular action performed by someone (unstated) towards the packages.