Sneaking in new roommates before the lease starts

[Amanda Thompson]

Hi all! I have a bit of a situation, which I will try to keep concise.

- 4 roommates on lease until Aug.29

- 2 of them have already moved out

- 2 NEW roommates signed a NEW lease with the remaining 2 from the original lease.

- NEW lease begins Aug. 30

The 2 roommates leaving have told me that the 2 remaining roommates plan to sneak in the 2 NEW roommates at the end of July. They are using the clause in the lease that says a guest can not stay more than 14 consecutive days. So technically they can stay 14 days, leave one night, and come back for 14 days? I do not like this clause and will be removing it from future leases, but it came standard in the sample Rules & Regulations.

How do I prove that new roommates moved in early?? Can they get away with the 14-day rule? Do I need to call a lawyer? Also, if I do prove it and evict them, then what happens to the new signed lease beginning Aug.30th?? Do I just let it go? They've always paid on time and I've really never had issues.