A missed coupon usually appears earlier than unpaid principal. It does not automatically mean the issuer will fail to perform, but it is the point at which general assurances should be replaced by documentation.
Verify the date and payment method in the terms
The terms usually set the payment frequency, the record date and the payment method. The difference between 'not paid' and 'paid differently than expected' is fundamental.
Also check which bank details the issuer holds for you — some cases have a trivial cause.
Compare the payment history
List every coupon received so far with dates and amounts. That shows whether this is the first miss or a gradual reduction.
The same list is one of the first inputs any reviewer will ask for.
Ask for a written explanation
A specific question tends to produce a specific answer: state the issue, the coupon period and the amount, and ask for a written payment date.
Keep the reply whatever it says. Even a vague answer belongs in the case timeline.
Consider what repetition means
A single miss and repeated non-payment are different situations for a holder. Repetition is usually the point to compare options other than waiting.
Any assessment of a specific issue still rests on documented facts, not assumptions about the issuer's finances.
If misses repeat, check whether your issue is among the cases on record and have your options reviewed.
This text is general information for bondholders. It is not legal advice and not an investment recommendation. Capital Investing Ventures a.s. is not a law firm. Any individual assessment depends on the specific documentation and circumstances of the case.