Can an employer ask you to sign a waiver waiting your right to collect unpaid wages?

No, an employer cannot legally ask you to sign a waiver that waives your right to collect unpaid wages. Such waivers are generally considered unenforceable under labor laws, as employees have the right to receive their earned wages. Employers are obligated to pay employees for work performed, and any agreement to forfeit that right would typically be deemed invalid. If faced with such a request, it's advisable to seek legal counsel.