If you're late on a mortgage payment, don't treat it like a regular payment because the property itself is often a key part of the collateral.
Key points
Late payments can incur fees, negatively impact your credit history, and may escalate to more serious consequences if they continue.
Contact the bank before payments pile up and request written solutions explaining that you're facing a temporary crisis.
Don't ignore any warnings or communications related to the collateral.
The figures, fees and limits in this answer vary by bank and change over time — confirm them with your bank or the official source before acting.