Question about formal obligation (Germany)

Nothing specific to this, but any document requiring a signature from another party can be viewed as void if altered.

It also just occurred to me that this may be a case of date format confusion (mm/dd/yyyy vs dd/mm/yyyy) where in the US 6/5/2018 is June 5th, in Europe that would be interpreted as May 6th.

I was unaware of this document (Verpflichtungserklärung = Requirements/duties declaration), but I found the official info on the Swiss Federal Government website: https://www.sem.admin.ch/dam/data/sem/einreise/merkblatt_einreise/mb-verpflicht-erklaerung-d.pdf

It is a letter of guarantee which the Swiss authorities may require before the issue of a visa. It is requested if the visitor(s) does/do not appear to have enough funds for emergencies. A guarantor (who must be a Swiss resident) guarantees to cover the cost of accidents, sickness or re-repatriation if necessary.

If you need this you must be a nationality which requires a visa for Switzerland, and be short of funds.

"Das Formular wird bei der Prüfung des Visumgesuchs ausschliesslich durch die zuständige Auslandvertretung abgegeben." - The blank form is issued as part of the checking of the visa application, i.e. you cannot get another blank form easily.

As Paul suggests, I would double check that you haven't just confused the date format. 6/5/2018 is 6th May 2018, because that is the order it is said in English, French, German and most other European languages.

If not; I would send it back to the person, and get them to correct it (cross out and write again), followed by signing and dating the amendment; which is the normal way in Switzerland to correct errors in official documents.

It is a letter of guarantee which the Swiss authorities may require before the issue of a visa.

The OP inquired about the regulations for Germany. Materially, they are the same as for Switzerland and they might even a bit more rigid. In principle, whoever has signed such a document will be liable for any costs incurred by the visitor including living costs, health care, and even costs of imprisonment if he commits a criminal offense. A wrong date can be changed only by the immigration authority. You probably would inable to do it yourself since the forms of those declarations are on forgery-proof paper.

Thank you all for the response. I am not planning to change this date myself ofcourse. I just wanted to know if I had to send it back to Germany and have it corrected or ask for a new one.