Learn Turkish: Mevzuatın açıkça yasaklamasına karşın şirket bu işlemi yapmış. - Despite the legislation clearly forbidding it, the company apparently did this process.

The postposition karşın means 'despite' and always requires the dative case. Here, the verbal noun yasaklama (forbidding) takes the 3rd person possessive -sı to link it to the legislation, a buffer letter -n-, and finally the dative suffix -a to become yasaklamasına karşın (despite its forbidding).

Why does 'mevzuat' take the genitive suffix '-ın'?

It forms a possessive relationship with the verbal noun phrase. Because the legislation is the specific entity doing the forbidding, it acts as the subject of the verbal noun. In Turkish, the subject of a verbal noun takes the genitive case, making the literal structure 'despite the legislation's forbidding'.

Could I use 'rağmen' instead of 'karşın' here?

Yes, rağmen means the exact same thing and also takes the dative case (yasaklamasına rağmen). karşın is just a slightly more formal, pure-Turkish alternative. This formal tone fits perfectly with legal or official vocabulary like mevzuat (legislation).

Why is the verb 'yapmış' used instead of the definite past 'yaptı'?

The suffix -mış is used for indirect knowledge or inference. By using yapmış, the speaker implies they did not witness the company doing the process directly. They likely found out about it after the fact, perhaps by reading an audit or seeing the results, hence the translation 'apparently did'.