# Term Servicer Group The Term Servicer group of contracts maintain records, enforce the terms of a Term Repo arrangement and automate the settlement and collateral management functions handled by the collateral agent in the traditional tri-party repo context. Each Term Repo arrangement requires the deployment of every single contract within this group and the relationship between each contract within this group is always 1:1. {% content-ref url="/pages/Wa1XTSMZ3ZSJF3WUpAgv" %} [Initialization Parameters](/term-finance-protocol/term-repo/term-servicer-group/initialization-parameters.md) {% endcontent-ref %} {% content-ref url="/pages/N0vsGkcOaMCtWv7AqgTJ" %} [Administrative Functions](/term-finance-protocol/term-repo/term-servicer-group/administrative-functions.md) {% endcontent-ref %}

Contract	Description and Key External Functions
`TermRepoCollateralManager.sol`	Enforces margin maintenance rules for adding/withdrawing, repurchasing and liquidating collateral
	`externalLockCollateral` - callable by borrower to add to their collateral balance
	`externalUnlockCollateral` - callable by borrower to withdraw excess collateral balance
	`batchLiquidation` - callable by public to liquidate one or more collateral tokens belonging to a borrower in margin deficit
	`batchLiquidationWithRepoToken` - callable by public to liquidate one or more collateral tokens belonging to a borrower in margin deficit using Repo Tokens in lieu of purchase token to pay down repo exposure
	`batchDefault`- callable by public to liquidate one or more collateral tokens belonging to a borrower in default due to a failure to repurchase
`TermRepoServicer.sol`	Maintains records, collects and disburse repurchase payments
	`submitRepurchasePayment` - callable by borrower to submit repurchase payment
	`redeemTermRepoTokens` - callable by liquidity supplier to receive repurchase payment
`SPECIALIST_ROLE`	`mintOpenExposure` - callable by users with `SPECIALIST_ROLE` to mint Term Repo Tokens and open offsetting repurchase obligation exposure (subject to servicing fee and mint cap) by depositing collateral
	`burnCollapseExposure` - callable by borrower to burn Term Repo Tokens against outstanding repurchase obligations
`TermRepoRolloverManager.sol`	Accepts and carries out borrower rollover instructions
	`electRollover` - callable by borrower to elect to rollover or extend into a new Term Repo using collateral from existing Term Repo
	`cancelRollover`- callable by borrower to cancel a rollover election
`TermRepoLocker.sol`	Contract in which Term Servicer locks collateral and purchase tokens
	`<no public functions>`

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