The paper discusses six Slovene oath forms from Styria, written in the period between the 1770's and the beginning of the 19th century. Five of them have not been recorded and published yet. The contents of one are known from an older sample. The documents can be divided into two groups based on their origin and spelling and language features. The first group comprises the forms from Graz, written in the central Slovenian (Carniolan) languags, the first one used by the Inner Austrian government and the other (in two different variations) by the provincional states. The second group comprises three oaths from the municipal archives of Ormož near the Croatian border. Two of them were used for newly accepted townsmen and one for city councillors. The older two, written around 1700, display distinctfeatures of the neighbouring Kajkavian Croatian literary language, whereas the third one has more characteristics of Eastern Styria. All three are strongly influenced by the Kajkavian spelling. The analysis also covers questions of the term "Croatian " for the borderland dialects around Ormož.