Do not do nothing.
Do not delay.
This is unlikely to go away by itself, and could get worse.
EITHER :
If you are sure, of if you believe, that you have never been to this dentist, then I suggest you write three letters along the following lines. Ideally, these should be on paper, in an envelope, but since you’ll be travelling, at least send them by mail.
If you do not receive replies from both Intrum and Credit Reform by the time you return, then send the same letter to each of them, again, this time in an envelope, registered at the Post Office. Keep those two receipts, with a copy of the letters sent, as proof of having sent it properly. A registered letter is the correct, formal way to do this, in Switzerland.
Letter One
Dear Dr Dentist
I have received two invoices, one from Intrum and one from Credit Reform, setting out that I (or someone with a name resembling mine) owe you Fr. 600.
Please see the attached copies.
Please note that they are made out to a similar but different name and address from mine.
As far as I am aware, I have never been treated by you. Could you please confirm this? Alternatively, if you do have records of my having been treated by you, could you please supply me with copies of all the accounts, including the dates and details of the treatment you carried out? Thank you.
Kind regards
Letter Two Dear Sirs and Mesdames at Intrum,
I have received two invoices, one from yourselves and one from Credit Reform, setting out that someone with a name resembling mine owes Dr DENTISTNAME Fr. 600.
Please see the attached copies.
As far as I am aware, I have never been treated by Dr DENTISTNAME.
As the invoices are not in my name, but in a different name, and were delivered to my address in error, I must presume that they are, in fact, intended for someone else.
If, on the other hand, you do have documentation to prove that this debt is mine, please send me copies of all the accounts, including the dates and details of the treatment Dr DENTISTNAME carried out. Thank you.
Letter Three
Dear Sirs and Mesdames at Credit Reform,
I have received two invoices, one from yourselves and one from Intrum, setting out that someone with a name resembling mine owes Dr DENTISTNAME Fr. 600.
Please see the attached copies.
As far as I am aware, I have never been treated by Dr DENTISTNAME.
As the invoices are not in my name, but in a different name, and were delivered to my address in error, I must presume that they are, in fact, intended for someone else.
If, on the other hand, you do have documentation to prove that this debt is mine, please send me copies of all the accounts, including the dates and details of the treatment Dr DENTISTNAME carried out. Thank you.
OR:
If, on the other hand, you really were seen by that dentist, then just pay the bill as you owe it. Do the right thing and settle the debt. There is no point in trying to get out of it, never mind that the name is mis-spelled.
Intrum has a terrible reputation for making people’s life a misery, on and on and on, so the sooner you deal with this properly, the better for you.