払わせて

make/let (someone) pay

→ 払う
払わ pay + make or let someone do + Te-form (conjunctive)
verb Rare #38,808
make/let (someone) pay Causative te-form of 払う: used to say that someone makes or allows another person to pay.
JA: 店長は新人に代金を払わせてから、商品を渡した。
EN: The manager made the new employee pay before handing over the product.
Conjugation of 払う
Present
払って払わせて
Past
Indicative present
Imperative

奴に武器代金を払わせてやる

I'll make him pay for the weapons.

— シティ・オブ・ゴッド (2002)

払わせてください

Please let me pay.

ここでツケ払わせてやる

I'll make you pay for this here.

— 荒野の用心棒 (1964)

じゃあここの勘定を払わせて下さい

Then please let me pay the bill here.

— 生きる (1952)