2 sentences for 找上门 (zhǎo​shàng​mén — seek out)

1. 他因为欠债，已经被几个债主找上门了。

   tā yīn​wèi qiàn​zhài, yǐ​jīng bèi jǐ gè zhài​zhǔ zhǎo​shàng​mén le.

   Because of his debts, several creditors have come looking for him at his door.

   Source: Dong Chinese Dictionary

2. 一听到敲门声，他就提心吊胆，生怕是债主找上门来。

   yī tīng​dào qiāo​mén​shēng, tā jiù tí​xīn​diào​dǎn, shēng​pà shì zhài​zhǔ zhǎo​shàng​mén lái.

   As soon as he heard the knock on the door, he was on edge, fearing it was a debt collector.

   Source: Dong Chinese Dictionary