Some states would call it a unlawful holdover.

If payment in full is not received, then you file an unlawful detainer with the local court and documents must again be properly served to the tenant.

Dangerous and highly unlawful. 

My name is Rick Stewart and if you contact me via social media (this website does not allow posting email or I would),  I can give you court documents and my attorney's information to verify that after THREE MONTHS of receiving zero rent, we had to forcefully evict (unlawful detainer) the tenant that Mario/Bridgehouse screened and moved in.

I tried that strategy with the camera phone the last time I went to the courthouse to look up a list of unlawful detainers.

For a landlord, especially one with multiple properties, it may be expected as a normal part of business.Although it may be "legal on paper", I believe it would be very challenging for a landlord to successfully win an unlawful detainer action with absolutely no prior notice of non-renewal of a tenant with a lease for at least one year.

It continues to be unlawful to solicit for investors outside an applicable exemption such as one under Rule 506(c).

HELOCs don't have a 'national' set of guidelines like the Fannie Mae / Freddie Mac loans do, each individual HELOC lender can (& does) make up whatever rules they want so long as they don't engage in unlawful discrimination or similar. 

I would personally refrain from even contemplating any creative ways to get someone out and instead, just refer it to an eviction attorney for an unlawful detainer.

After a specified time if your tenant does not stop subletting or does not vacate, your attorney will file an unlawful detainer to remove the occupants.