can i change the locks?

[Mike R.]

tenant was served multiple notices (3-day, 10-day and 20 day....too much detail to bother with here), eviction papers are filed with court and we were waiting for tenant to be served.  today, we receive email from another tenant in building telling us she believes the problem tenant has moved out.  i will find out later tonight, but if i get there and it is clear they have moved out, can i change the locks even though i do not have "official" notice from the tenant?